// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Broadcom B43legacy wireless driver
*
* Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
* Copyright (c) 2005-2008 Stefano Brivio <stefano.brivio@polimi.it>
* Copyright (c) 2005, 2006 Michael Buesch <m@bues.ch>
* Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
* Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
* Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>
*
* Some parts of the code in this file are derived from the ipw2200
* driver Copyright(c) 2003 - 2004 Intel Corporation.
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/workqueue.h>
#include <linux/sched/signal.h>
#include <linux/skbuff.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <net/dst.h>
#include <asm/unaligned.h>
#include "b43legacy.h"
#include "main.h"
#include "debugfs.h"
#include "phy.h"
#include "dma.h"
#include "pio.h"
#include "sysfs.h"
#include "xmit.h"
#include "radio.h"
MODULE_DESCRIPTION("Broadcom B43legacy wireless driver");
MODULE_AUTHOR("Martin Langer");
MODULE_AUTHOR("Stefano Brivio");
MODULE_AUTHOR("Michael Buesch");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("b43legacy/ucode2.fw");
MODULE_FIRMWARE("b43legacy/ucode4.fw");
#if defined(CONFIG_B43LEGACY_DMA) && defined(CONFIG_B43LEGACY_PIO)
static int modparam_pio;
module_param_named(pio, modparam_pio, int, 0444);
MODULE_PARM_DESC(pio, "enable(1) / disable(0) PIO mode");
#elif defined(CONFIG_B43LEGACY_DMA)
# define modparam_pio 0
#elif defined(CONFIG_B43LEGACY_PIO)
# define modparam_pio 1
#endif
static int modparam_bad_frames_preempt;
module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444);
MODULE_PARM_DESC(bad_frames_preempt, "enable(1) / disable(0) Bad Frames"
" Preemption");
static char modparam_fwpostfix[16];
module_param_string(fwpostfix, modparam_fwpostfix, 16, 0444);
MODULE_PARM_DESC(fwpostfix, "Postfix for the firmware files to load.");
/* The following table supports BCM4301, BCM4303 and BCM4306/2 devices. */
static const struct ssb_device_id b43legacy_ssb_tbl[] = {
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 2),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 4),
{},
};
MODULE_DEVICE_TABLE(ssb, b43legacy_ssb_tbl);
/* Channel and ratetables are shared for all devices.
* They can't be const, because ieee80211 puts some precalculated
* data in there. This data is the same for all devices, so we don't
* get concurrency issues */
#define RATETAB_ENT(_rateid, _flags) \
{ \
.bitrate = B43legacy_RATE_TO_100KBPS(_rateid), \
.hw_value = (_rateid), \
.flags = (_flags), \
}
/*
* NOTE: When changing this, sync with xmit.c's
* b43legacy_plcp_get_bitrate_idx_* functions!
*/
static struct ieee80211_rate __b43legacy_ratetable[] = {
RATETAB_ENT(B43legacy_CCK_RATE_1MB, 0),
RATETAB_ENT(B43legacy_CCK_RATE_2MB, IEEE80211_RATE_SHORT_PREAMBLE),
RATETAB_ENT(B43legacy_CCK_RATE_5MB, IEEE80211_RATE_SHORT_PREAMBLE),
RATETAB_ENT(B43legacy_CCK_RATE_11MB, IEEE80211_RATE_SHORT_PREAMBLE),
RATETAB_ENT(B43legacy_OFDM_RATE_6MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_9MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_12MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_18MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_24MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_36MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_48MB, 0),
RATETAB_ENT(B43legacy_OFDM_RATE_54MB, 0),
};
#define b43legacy_b_ratetable (__b43legacy_ratetable + 0)
#define b43legacy_b_ratetable_size 4
#define b43legacy_g_ratetable (__b43legacy_ratetable + 0)
#define b43legacy_g_ratetable_size 12
#define CHANTAB_ENT(_chanid, _freq) \
{ \
.center_freq = (_freq), \
.hw_value = (_chanid), \
}
static struct ieee80211_channel b43legacy_bg_chantable[] = {
CHANTAB_ENT(1, 2412),
CHANTAB_ENT(2, 2417),
CHANTAB_ENT(3, 2422),
CHANTAB_ENT(4, 2427),
CHANTAB_ENT(5, 2432),
CHANTAB_ENT(6, 2437),
CHANTAB_ENT(7, 2442),
CHANTAB_ENT(8, 2447),
CHANTAB_ENT(9, 2452),
CHANTAB_ENT(10, 2457),
CHANTAB_ENT(11, 2462),
CHANTAB_ENT(12, 2467),
CHANTAB_ENT(13, 2472),
CHANTAB_ENT(14, 2484),
};
static struct ieee80211_supported_band b43legacy_band_2GHz_BPHY = {
.channels = b43legacy_bg_chantable,
.n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
.bitrates = b43legacy_b_ratetable,
.n_bitrates = b43legacy_b_ratetable_size,
};
static struct ieee80211_supported_band b43legacy_band_2GHz_GPHY = {
.channels = b43legacy_bg_chantable,
.n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
.bitrates = b43legacy_g_ratetable,
.n_bitrates = b43legacy_g_ratetable_size,
};
static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev);
static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev);
static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev);
static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev);
static int b43legacy_ratelimit(struct b43legacy_wl *wl)
{
if (!wl || !wl->current_dev)
return 1;
if (b43legacy_status(wl->current_dev) < B43legacy_STAT_STARTED)
return 1;
/* We are up and running.
* Ratelimit the messages to avoid DoS over the net. */
return net_ratelimit();
}
void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
if (!b43legacy_ratelimit(wl))
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk(KERN_INFO "b43legacy-%s: %pV",
(wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
va_end(args);
}
void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
if (!b43legacy_ratelimit(wl))
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk(KERN_ERR "b43legacy-%s ERROR: %pV",
(wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
va_end(args);
}
void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
if (!b43legacy_ratelimit(wl))
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk(KERN_WARNING "b43legacy-%s warning: %pV",
(wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
va_end(args);
}
#if B43legacy_DEBUG
void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
printk(KERN_DEBUG "b43legacy-%s debug: %pV",
(wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan", &vaf);
va_end(args);
}
#endif /* DEBUG */
static void b43legacy_ram_write(struct b43legacy_wldev *dev, u16 offset,
u32 val)
{
u32 status;
B43legacy_WARN_ON(offset % 4 != 0);
status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
if (status & B43legacy_MACCTL_BE)
val = swab32(val);
b43legacy_write32(dev, B43legacy_MMIO_RAM_CONTROL, offset);
b43legacy_write32(dev, B43legacy_MMIO_RAM_DATA, val);
}
static inline
void b43legacy_shm_control_word(struct b43legacy_wldev *dev,
u16 routing, u16 offset)
{
u32 control;
/* "offset" is the WORD offset. */
control = routing;
control <<= 16;
control |= offset;
b43legacy_write32(dev, B43legacy_MMIO_SHM_CONTROL, control);
}
u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
u16 routing, u16 offset)
{
u32 ret;
if (routing == B43legacy_SHM_SHARED) {
B43legacy_WARN_ON((offset & 0x0001) != 0);
if (offset & 0x0003) {
/* Unaligned access */
b43legacy_shm_control_word(dev, routing, offset >> 2);
ret = b43legacy_read16(dev,
B43legacy_MMIO_SHM_DATA_UNALIGNED);
ret <<= 16;
b43legacy_shm_control_word(dev, routing,
(offset >> 2) + 1);
ret |= b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
return ret;
}
offset >>= 2;
}
b43legacy_shm_control_word(dev, routing, offset);
ret = b43legacy_read32(dev, B43legacy_MMIO_SHM_DATA);
return ret;
}
u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
u16 routing, u16 offset)
{
u16 ret;
if (routing == B43legacy_SHM_SHARED) {
B43legacy_WARN_ON((offset & 0x0001) != 0);
if (offset & 0x0003) {
/* Unaligned access */
b43legacy_shm_control_word(dev, routing, offset >> 2);
ret = b43legacy_read16(dev,
B43legacy_MMIO_SHM_DATA_UNALIGNED);
return ret;
}
offset >>= 2;
}
b43legacy_shm_control_word(dev, routing, offset);
ret = b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);
return ret;
}
void b43legacy_shm_write32(struct b43legacy_wldev *dev,
u16 routing, u16 offset,
u32 value)
{
if (routing == B43legacy_SHM_SHARED) {
B43legacy_WARN_ON((offset & 0x0001) != 0);
if (offset & 0x0003) {
/* Unaligned access */
b43legacy_shm_control_word(dev, routing, offset >> 2);
b43legacy_write16(dev,
B43legacy_MMIO_SHM_DATA_UNALIGNED,
(value >> 16) & 0xffff);
b43legacy_shm_control_word(dev, routing,
(offset >> 2) + 1);
b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA,
value & 0xffff);
return;
}
offset >>= 2;
}
b43legacy_shm_control_word(dev, routing, offset);
b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, value);
}
void b43legacy_shm_write16(struct b43legacy_wldev *dev, u16 routing, u16 offset,
u16 value)
{
if (routing == B43legacy_SHM_SHARED) {
B43legacy_WARN_ON((offset & 0x0001) != 0);
if (offset & 0x0003) {
/* Unaligned access */
b43legacy_shm_control_word(dev, routing, offset >> 2);
b43legacy_write16(dev,
B43legacy_MMIO_SHM_DATA_UNALIGNED,
value);
return;
}
offset >>= 2;
}
b43legacy_shm_control_word(dev, routing, offset);
b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA, value);
}
/* Read HostFlags */
u32 b43legacy_hf_read(struct b43legacy_wldev *dev)
{
u32 ret;
ret = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_HOSTFHI);
ret <<= 16;
ret |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_HOSTFLO);
return ret;
}
/* Write HostFlags */
void b43legacy_hf_write(struct b43legacy_wldev *dev, u32 value)
{
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_HOSTFLO,
(value & 0x0000FFFF));
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_HOSTFHI,
((value & 0xFFFF0000) >> 16));
}
void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf)
{
/* We need to be careful. As we read the TSF from multiple
* registers, we should take care of register overflows.
* In theory, the whole tsf read process should be atomic.
* We try to be atomic here, by restaring the read process,
* if any of the high registers changed (overflowed).
*/
if (dev->dev->id.revision >= 3) {
u32 low;
u32 high;
u32 high2;
do {
high = b43legacy_read32(dev,
B43legacy_MMIO_REV3PLUS_TSF_HIGH);
low = b43legacy_read32(dev,
B43legacy_MMIO_REV3PLUS_TSF_LOW);
high2 = b43legacy_read32(dev,
B43legacy_MMIO_REV3PLUS_TSF_HIGH);
} while (unlikely(high != high2));
*tsf = high;
*tsf <<= 32;
*tsf |= low;
} else {
u64 tmp;
u16 v0;
u16 v1;
u16 v2;
u16 v3;
u16 test1;
u16 test2;
u16 test3;
do {
v3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
v2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
v1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
v0 = b43legacy_read16(dev, B43legacy_MMIO_TSF_0);
test3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
test2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
test1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
} while (v3 != test3 || v2 != test2 || v1 != test1);
*tsf = v3;
*tsf <<= 48;
tmp = v2;
tmp <<= 32;
*tsf |= tmp;
tmp = v1;
tmp <<= 16;
*tsf |= tmp;
*tsf |= v0;
}
}
static void b43legacy_time_lock(struct b43legacy_wldev *dev)
{
u32 status;
status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
status |= B43legacy_MACCTL_TBTTHOLD;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
}
static void b43legacy_time_unlock(struct b43legacy_wldev *dev)
{
u32 status;
status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
status &= ~B43legacy_MACCTL_TBTTHOLD;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
}
static void b43legacy_tsf_write_locked(struct b43legacy_wldev *dev, u64 tsf)
{
/* Be careful with the in-progress timer.
* First zero out the low register, so we have a full
* register-overflow duration to complete the operation.
*/
if (dev->dev->id.revision >= 3) {
u32 lo = (tsf & 0x00000000FFFFFFFFULL);
u32 hi = (tsf & 0xFFFFFFFF00000000ULL) >> 32;
b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW, 0);
b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_HIGH,
hi);
b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW,
lo);
} else {
u16 v0 = (tsf & 0x000000000000FFFFULL);
u16 v1 = (tsf & 0x00000000FFFF0000ULL) >> 16;
u16 v2 = (tsf & 0x0000FFFF00000000ULL) >> 32;
u16 v3 = (tsf & 0xFFFF000000000000ULL) >> 48;
b43legacy_write16(dev, B43legacy_MMIO_TSF_0, 0);
b43legacy_write16(dev, B43legacy_MMIO_TSF_3, v3);
b43legacy_write16(dev, B43legacy_MMIO_TSF_2, v2);
b43legacy_write16(dev, B43legacy_MMIO_TSF_1, v1);
b43legacy_write16(dev, B43legacy_MMIO_TSF_0, v0);
}
}
void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf)
{
b43legacy_time_lock(dev);
b43legacy_tsf_write_locked(dev, tsf);
b43legacy_time_unlock(dev);
}
static
void b43legacy_macfilter_set(struct b43legacy_wldev *dev,
u16 offset, const u8 *mac)
{
static const u8 zero_addr[ETH_ALEN] = { 0 };
u16 data;
if (!mac)
mac = zero_addr;
offset |= 0x0020;
b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_CONTROL, offset);
data = mac[0];
data |= mac[1] << 8;
b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
data = mac[2];
data |= mac[3] << 8;
b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
data = mac[4];
data |= mac[5] << 8;
b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
}
static void b43legacy_write_mac_bssid_templates(struct b43legacy_wldev *dev)
{
static const u8 zero_addr[ETH_ALEN] = { 0 };
const u8 *mac = dev->wl->mac_addr;
const u8 *bssid = dev->wl->bssid;
u8 mac_bssid[ETH_ALEN * 2];
int i;
u32 tmp;
if (!bssid)
bssid = zero_addr;
if (!mac)
mac = zero_addr;
b43legacy_macfilter_set(dev, B43legacy_MACFILTER_BSSID, bssid);
memcpy(mac_bssid, mac, ETH_ALEN);
memcpy(mac_bssid + ETH_ALEN, bssid, ETH_ALEN);
/* Write our MAC address and BSSID to template ram */
for (i = 0; i < ARRAY_SIZE(mac_bssid); i += sizeof(u32)) {
tmp = (u32)(mac_bssid[i + 0]);
tmp |= (u32)(mac_bssid[i + 1]) << 8;
tmp |= (u32)(mac_bssid[i + 2]) << 16;
tmp |= (u32)(mac_bssid[i + 3]) << 24;
b43legacy_ram_write(dev, 0x20 + i, tmp);
b43legacy_ram_write(dev, 0x78 + i, tmp);
b43legacy_ram_write(dev, 0x478 + i, tmp);
}
}
static void b43legacy_upload_card_macaddress(struct b43legacy_wldev *dev)
{
b43legacy_write_mac_bssid_templates(dev);
b43legacy_macfilter_set(dev, B43legacy_MACFILTER_SELF,
dev->wl->mac_addr);
}
static void b43legacy_set_slot_time(struct b43legacy_wldev *dev,
u16 slot_time)
{
/* slot_time is in usec. */
if (dev->phy.type != B43legacy_PHYTYPE_G)
return;
b43legacy_write16(dev, 0x684, 510 + slot_time);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0010,
slot_time);
}
static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
{
b43legacy_set_slot_time(dev, 9);
}
static void b43legacy_short_slot_timing_disable(struct b43legacy_wldev *dev)
{
b43legacy_set_slot_time(dev, 20);
}
/* Synchronize IRQ top- and bottom-half.
* IRQs must be masked before calling this.
* This must not be called with the irq_lock held.
*/
static void b43legacy_synchronize_irq(struct b43legacy_wldev *dev)
{
synchronize_irq(dev->dev->irq);
tasklet_kill(&dev->isr_tasklet);
}
/* DummyTransmission function, as documented on
* https://bcm-specs.sipsolutions.net/DummyTransmission
*/
void b43legacy_dummy_transmission(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
unsigned int i;
unsigned int max_loop;
u16 value;
u32 buffer[5] = {
0x00000000,
0x00D40000,
0x00000000,
0x01000000,
0x00000000,
};
switch (phy->type) {
case B43legacy_PHYTYPE_B:
case B43legacy_PHYTYPE_G:
max_loop = 0xFA;
buffer[0] = 0x000B846E;
break;
default:
B43legacy_BUG_ON(1);
return;
}
for (i = 0; i < 5; i++)
b43legacy_ram_write(dev, i * 4, buffer[i]);
/* dummy read follows */
b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
b43legacy_write16(dev, 0x0568, 0x0000);
b43legacy_write16(dev, 0x07C0, 0x0000);
b43legacy_write16(dev, 0x050C, 0x0000);
b43legacy_write16(dev, 0x0508, 0x0000);
b43legacy_write16(dev, 0x050A, 0x0000);
b43legacy_write16(dev, 0x054C, 0x0000);
b43legacy_write16(dev, 0x056A, 0x0014);
b43legacy_write16(dev, 0x0568, 0x0826);
b43legacy_write16(dev, 0x0500, 0x0000);
b43legacy_write16(dev, 0x0502, 0x0030);
if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
b43legacy_radio_write16(dev, 0x0051, 0x0017);
for (i = 0x00; i < max_loop; i++) {
value = b43legacy_read16(dev, 0x050E);
if (value & 0x0080)
break;
udelay(10);
}
for (i = 0x00; i < 0x0A; i++) {
value = b43legacy_read16(dev, 0x050E);
if (value & 0x0400)
break;
udelay(10);
}
for (i = 0x00; i < 0x0A; i++) {
value = b43legacy_read16(dev, 0x0690);
if (!(value & 0x0100))
break;
udelay(10);
}
if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
b43legacy_radio_write16(dev, 0x0051, 0x0037);
}
/* Turn the Analog ON/OFF */
static void b43legacy_switch_analog(struct b43legacy_wldev *dev, int on)
{
b43legacy_write16(dev, B43legacy_MMIO_PHY0, on ? 0 : 0xF4);
}
void b43legacy_wireless_core_reset(struct b43legacy_wldev *dev, u32 flags)
{
u32 tmslow;
u32 macctl;
flags |= B43legacy_TMSLOW_PHYCLKEN;
flags |= B43legacy_TMSLOW_PHYRESET;
ssb_device_enable(dev->dev, flags);
msleep(2); /* Wait for the PLL to turn on. */
/* Now take the PHY out of Reset again */
tmslow = ssb_read32(dev->dev, SSB_TMSLOW);
tmslow |= SSB_TMSLOW_FGC;
tmslow &= ~B43legacy_TMSLOW_PHYRESET;
ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
msleep(1);
tmslow &= ~SSB_TMSLOW_FGC;
ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
msleep(1);
/* Turn Analog ON */
b43legacy_switch_analog(dev, 1);
macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
macctl &= ~B43legacy_MACCTL_GMODE;
if (flags & B43legacy_TMSLOW_GMODE) {
macctl |= B43legacy_MACCTL_GMODE;
dev->phy.gmode = true;
} else
dev->phy.gmode = false;
macctl |= B43legacy_MACCTL_IHR_ENABLED;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
}
static void handle_irq_transmit_status(struct b43legacy_wldev *dev)
{
u32 v0;
u32 v1;
u16 tmp;
struct b43legacy_txstatus stat;
while (1) {
v0 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
if (!(v0 & 0x00000001))
break;
v1 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
stat.cookie = (v0 >> 16);
stat.seq = (v1 & 0x0000FFFF);
stat.phy_stat = ((v1 & 0x00FF0000) >> 16);
tmp = (v0 & 0x0000FFFF);
stat.frame_count = ((tmp & 0xF000) >> 12);
stat.rts_count = ((tmp & 0x0F00) >> 8);
stat.supp_reason = ((tmp & 0x001C) >> 2);
stat.pm_indicated = !!(tmp & 0x0080);
stat.intermediate = !!(tmp & 0x0040);
stat.for_ampdu = !!(tmp & 0x0020);
stat.acked = !!(tmp & 0x0002);
b43legacy_handle_txstatus(dev, &stat);
}
}
static void drain_txstatus_queue(struct b43legacy_wldev *dev)
{
u32 dummy;
if (dev->dev->id.revision < 5)
return;
/* Read all entries from the microcode TXstatus FIFO
* and throw them away.
*/
while (1) {
dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
if (!(dummy & 0x00000001))
break;
dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
}
}
static u32 b43legacy_jssi_read(struct b43legacy_wldev *dev)
{
u32 val = 0;
val = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x40A);
val <<= 16;
val |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x408);
return val;
}
static void b43legacy_jssi_write(struct b43legacy_wldev *dev, u32 jssi)
{
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x408,
(jssi & 0x0000FFFF));
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x40A,
(jssi & 0xFFFF0000) >> 16);
}
static void b43legacy_generate_noise_sample(struct b43legacy_wldev *dev)
{
b43legacy_jssi_write(dev, 0x7F7F7F7F);
b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
| B43legacy_MACCMD_BGNOISE);
B43legacy_WARN_ON(dev->noisecalc.channel_at_start !=
dev->phy.channel);
}
static void b43legacy_calculate_link_quality(struct b43legacy_wldev *dev)
{
/* Top half of Link Quality calculation. */
if (dev->noisecalc.calculation_running)
return;
dev->noisecalc.channel_at_start = dev->phy.channel;
dev->noisecalc.calculation_running = true;
dev->noisecalc.nr_samples = 0;
b43legacy_generate_noise_sample(dev);
}
static void handle_irq_noise(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
u16 tmp;
u8 noise[4];
u8 i;
u8 j;
s32 average;
/* Bottom half of Link Quality calculation. */
B43legacy_WARN_ON(!dev->noisecalc.calculation_running);
if (dev->noisecalc.channel_at_start != phy->channel)
goto drop_calculation;
*((__le32 *)noise) = cpu_to_le32(b43legacy_jssi_read(dev));
if (noise[0] == 0x7F || noise[1] == 0x7F ||
noise[2] == 0x7F || noise[3] == 0x7F)
goto generate_new;
/* Get the noise samples. */
B43legacy_WARN_ON(dev->noisecalc.nr_samples >= 8);
i = dev->noisecalc.nr_samples;
noise[0] = clamp_val(noise[0], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
noise[1] = clamp_val(noise[1], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
noise[2] = clamp_val(noise[2], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
noise[3] = clamp_val(noise[3], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
dev->noisecalc.samples[i][0] = phy->nrssi_lt[noise[0]];
dev->noisecalc.samples[i][1] = phy->nrssi_lt[noise[1]];
dev->noisecalc.samples[i][2] = phy->nrssi_lt[noise[2]];
dev->noisecalc.samples[i][3] = phy->nrssi_lt[noise[3]];
dev->noisecalc.nr_samples++;
if (dev->noisecalc.nr_samples == 8) {
/* Calculate the Link Quality by the noise samples. */
average = 0;
for (i = 0; i < 8; i++) {
for (j = 0; j < 4; j++)
average += dev->noisecalc.samples[i][j];
}
average /= (8 * 4);
average *= 125;
average += 64;
average /= 128;
tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
0x40C);
tmp = (tmp / 128) & 0x1F;
if (tmp >= 8)
average += 2;
else
average -= 25;
if (tmp == 8)
average -= 72;
else
average -= 48;
dev->stats.link_noise = average;
drop_calculation:
dev->noisecalc.calculation_running = false;
return;
}
generate_new:
b43legacy_generate_noise_sample(dev);
}
static void handle_irq_tbtt_indication(struct b43legacy_wldev *dev)
{
if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP)) {
/* TODO: PS TBTT */
} else {
if (1/*FIXME: the last PSpoll frame was sent successfully */)
b43legacy_power_saving_ctl_bits(dev, -1, -1);
}
if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
dev->dfq_valid = true;
}
static void handle_irq_atim_end(struct b43legacy_wldev *dev)
{
if (dev->dfq_valid) {
b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
| B43legacy_MACCMD_DFQ_VALID);
dev->dfq_valid = false;
}
}
static void handle_irq_pmq(struct b43legacy_wldev *dev)
{
u32 tmp;
/* TODO: AP mode. */
while (1) {
tmp = b43legacy_read32(dev, B43legacy_MMIO_PS_STATUS);
if (!(tmp & 0x00000008))
break;
}
/* 16bit write is odd, but correct. */
b43legacy_write16(dev, B43legacy_MMIO_PS_STATUS, 0x0002);
}
static void b43legacy_write_template_common(struct b43legacy_wldev *dev,
const u8 *data, u16 size,
u16 ram_offset,
u16 shm_size_offset, u8 rate)
{
u32 i;
u32 tmp;
struct b43legacy_plcp_hdr4 plcp;
plcp.data = 0;
b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate);
b43legacy_ram_write(dev, ram_offset, le32_to_cpu(plcp.data));
ram_offset += sizeof(u32);
/* The PLCP is 6 bytes long, but we only wrote 4 bytes, yet.
* So leave the first two bytes of the next write blank.
*/
tmp = (u32)(data[0]) << 16;
tmp |= (u32)(data[1]) << 24;
b43legacy_ram_write(dev, ram_offset, tmp);
ram_offset += sizeof(u32);
for (i = 2; i < size; i += sizeof(u32)) {
tmp = (u32)(data[i + 0]);
if (i + 1 < size)
tmp |= (u32)(data[i + 1]) << 8;
if (i + 2 < size)
tmp |= (u32)(data[i + 2]) << 16;
if (i + 3 < size)
tmp |= (u32)(data[i + 3]) << 24;
b43legacy_ram_write(dev, ram_offset + i - 2, tmp);
}
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_size_offset,
size + sizeof(struct b43legacy_plcp_hdr6));
}
/* Convert a b43legacy antenna number value to the PHY TX control value. */
static u16 b43legacy_antenna_to_phyctl(int antenna)
{
switch (antenna) {
case B43legacy_ANTENNA0:
return B43legacy_TX4_PHY_ANT0;
case B43legacy_ANTENNA1:
return B43legacy_TX4_PHY_ANT1;
}
return B43legacy_TX4_PHY_ANTLAST;
}
static void b43legacy_write_beacon_template(struct b43legacy_wldev *dev,
u16 ram_offset,
u16 shm_size_offset)
{
unsigned int i, len, variable_len;
const struct ieee80211_mgmt *bcn;
const u8 *ie;
bool tim_found = false;
unsigned int rate;
u16 ctl;
int antenna;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(dev->wl->current_beacon);
bcn = (const struct ieee80211_mgmt *)(dev->wl->current_beacon->data);
len = min_t(size_t, dev->wl->current_beacon->len,
0x200 - sizeof(struct b43legacy_plcp_hdr6));
rate = ieee80211_get_tx_rate(dev->wl->hw, info)->hw_value;
b43legacy_write_template_common(dev, (const u8 *)bcn, len, ram_offset,
shm_size_offset, rate);
/* Write the PHY TX control parameters. */
antenna = B43legacy_ANTENNA_DEFAULT;
antenna = b43legacy_antenna_to_phyctl(antenna);
ctl = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_BEACPHYCTL);
/* We can't send beacons with short preamble. Would get PHY errors. */
ctl &= ~B43legacy_TX4_PHY_SHORTPRMBL;
ctl &= ~B43legacy_TX4_PHY_ANT;
ctl &= ~B43legacy_TX4_PHY_ENC;
ctl |= antenna;
ctl |= B43legacy_TX4_PHY_ENC_CCK;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_BEACPHYCTL, ctl);
/* Find the position of the TIM and the DTIM_period value
* and write them to SHM. */
ie = bcn->u.beacon.variable;
variable_len = len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
for (i = 0; i < variable_len - 2; ) {
uint8_t ie_id, ie_len;
ie_id = ie[i];
ie_len = ie[i + 1];
if (ie_id == 5) {
u16 tim_position;
u16 dtim_period;
/* This is the TIM Information Element */
/* Check whether the ie_len is in the beacon data range. */
if (variable_len < ie_len + 2 + i)
break;
/* A valid TIM is at least 4 bytes long. */
if (ie_len < 4)
break;
tim_found = true;
tim_position = sizeof(struct b43legacy_plcp_hdr6);
tim_position += offsetof(struct ieee80211_mgmt,
u.beacon.variable);
tim_position += i;
dtim_period = ie[i + 3];
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_TIMPOS, tim_position);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_DTIMP, dtim_period);
break;
}
i += ie_len + 2;
}
if (!tim_found) {
b43legacywarn(dev->wl, "Did not find a valid TIM IE in the "
"beacon template packet. AP or IBSS operation "
"may be broken.\n");
} else
b43legacydbg(dev->wl, "Updated beacon template\n");
}
static void b43legacy_write_probe_resp_plcp(struct b43legacy_wldev *dev,
u16 shm_offset, u16 size,
struct ieee80211_rate *rate)
{
struct b43legacy_plcp_hdr4 plcp;
u32 tmp;
__le16 dur;
plcp.data = 0;
b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate->hw_value);
dur = ieee80211_generic_frame_duration(dev->wl->hw,
dev->wl->vif,
NL80211_BAND_2GHZ,
size,
rate);
/* Write PLCP in two parts and timing for packet transfer */
tmp = le32_to_cpu(plcp.data);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset,
tmp & 0xFFFF);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 2,
tmp >> 16);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 6,
le16_to_cpu(dur));
}
/* Instead of using custom probe response template, this function
* just patches custom beacon template by:
* 1) Changing packet type
* 2) Patching duration field
* 3) Stripping TIM
*/
static const u8 *b43legacy_generate_probe_resp(struct b43legacy_wldev *dev,
u16 *dest_size,
struct ieee80211_rate *rate)
{
const u8 *src_data;
u8 *dest_data;
u16 src_size, elem_size, src_pos, dest_pos;
__le16 dur;
struct ieee80211_hdr *hdr;
size_t ie_start;
src_size = dev->wl->current_beacon->len;
src_data = (const u8 *)dev->wl->current_beacon->data;
/* Get the start offset of the variable IEs in the packet. */
ie_start = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
B43legacy_WARN_ON(ie_start != offsetof(struct ieee80211_mgmt,
u.beacon.variable));
if (B43legacy_WARN_ON(src_size < ie_start))
return NULL;
dest_data = kmalloc(src_size, GFP_ATOMIC);
if (unlikely(!dest_data))
return NULL;
/* Copy the static data and all Information Elements, except the TIM. */
memcpy(dest_data, src_data, ie_start);
src_pos = ie_start;
dest_pos = ie_start;
for ( ; src_pos < src_size - 2; src_pos += elem_size) {
elem_size = src_data[src_pos + 1] + 2;
if (src_data[src_pos] == 5) {
/* This is the TIM. */
continue;
}
memcpy(dest_data + dest_pos, src_data + src_pos, elem_size);
dest_pos += elem_size;
}
*dest_size = dest_pos;
hdr = (struct ieee80211_hdr *)dest_data;
/* Set the frame control. */
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_PROBE_RESP);
dur = ieee80211_generic_frame_duration(dev->wl->hw,
dev->wl->vif,
NL80211_BAND_2GHZ,
*dest_size,
rate);
hdr->duration_id = dur;
return dest_data;
}
static void b43legacy_write_probe_resp_template(struct b43legacy_wldev *dev,
u16 ram_offset,
u16 shm_size_offset,
struct ieee80211_rate *rate)
{
const u8 *probe_resp_data;
u16 size;
size = dev->wl->current_beacon->len;
probe_resp_data = b43legacy_generate_probe_resp(dev, &size, rate);
if (unlikely(!probe_resp_data))
return;
/* Looks like PLCP headers plus packet timings are stored for
* all possible basic rates
*/
b43legacy_write_probe_resp_plcp(dev, 0x31A, size,
&b43legacy_b_ratetable[0]);
b43legacy_write_probe_resp_plcp(dev, 0x32C, size,
&b43legacy_b_ratetable[1]);
b43legacy_write_probe_resp_plcp(dev, 0x33E, size,
&b43legacy_b_ratetable[2]);
b43legacy_write_probe_resp_plcp(dev, 0x350, size,
&b43legacy_b_ratetable[3]);
size = min_t(size_t, size,
0x200 - sizeof(struct b43legacy_plcp_hdr6));
b43legacy_write_template_common(dev, probe_resp_data,
size, ram_offset,
shm_size_offset, rate->hw_value);
kfree(probe_resp_data);
}
static void b43legacy_upload_beacon0(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
if (wl->beacon0_uploaded)
return;
b43legacy_write_beacon_template(dev, 0x68, 0x18);
/* FIXME: Probe resp upload doesn't really belong here,
* but we don't use that feature anyway. */
b43legacy_write_probe_resp_template(dev, 0x268, 0x4A,
&__b43legacy_ratetable[3]);
wl->beacon0_uploaded = true;
}
static void b43legacy_upload_beacon1(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
if (wl->beacon1_uploaded)
return;
b43legacy_write_beacon_template(dev, 0x468, 0x1A);
wl->beacon1_uploaded = true;
}
static void handle_irq_beacon(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
u32 cmd, beacon0_valid, beacon1_valid;
if (!b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
return;
/* This is the bottom half of the asynchronous beacon update. */
/* Ignore interrupt in the future. */
dev->irq_mask &= ~B43legacy_IRQ_BEACON;
cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
beacon0_valid = (cmd & B43legacy_MACCMD_BEACON0_VALID);
beacon1_valid = (cmd & B43legacy_MACCMD_BEACON1_VALID);
/* Schedule interrupt manually, if busy. */
if (beacon0_valid && beacon1_valid) {
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, B43legacy_IRQ_BEACON);
dev->irq_mask |= B43legacy_IRQ_BEACON;
return;
}
if (unlikely(wl->beacon_templates_virgin)) {
/* We never uploaded a beacon before.
* Upload both templates now, but only mark one valid. */
wl->beacon_templates_virgin = false;
b43legacy_upload_beacon0(dev);
b43legacy_upload_beacon1(dev);
cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
cmd |= B43legacy_MACCMD_BEACON0_VALID;
b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
} else {
if (!beacon0_valid) {
b43legacy_upload_beacon0(dev);
cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
cmd |= B43legacy_MACCMD_BEACON0_VALID;
b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
} else if (!beacon1_valid) {
b43legacy_upload_beacon1(dev);
cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
cmd |= B43legacy_MACCMD_BEACON1_VALID;
b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
}
}
}
static void b43legacy_beacon_update_trigger_work(struct work_struct *work)
{
struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
beacon_update_trigger);
struct b43legacy_wldev *dev;
mutex_lock(&wl->mutex);
dev = wl->current_dev;
if (likely(dev && (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED))) {
spin_lock_irq(&wl->irq_lock);
/* Update beacon right away or defer to IRQ. */
handle_irq_beacon(dev);
/* The handler might have updated the IRQ mask. */
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
dev->irq_mask);
spin_unlock_irq(&wl->irq_lock);
}
mutex_unlock(&wl->mutex);
}
/* Asynchronously update the packet templates in template RAM.
* Locking: Requires wl->irq_lock to be locked. */
static void b43legacy_update_templates(struct b43legacy_wl *wl)
{
struct sk_buff *beacon;
/* This is the top half of the ansynchronous beacon update. The bottom
* half is the beacon IRQ. Beacon update must be asynchronous to avoid
* sending an invalid beacon. This can happen for example, if the
* firmware transmits a beacon while we are updating it. */
/* We could modify the existing beacon and set the aid bit in the TIM
* field, but that would probably require resizing and moving of data
* within the beacon template. Simply request a new beacon and let
* mac80211 do the hard work. */
beacon = ieee80211_beacon_get(wl->hw, wl->vif, 0);
if (unlikely(!beacon))
return;
if (wl->current_beacon)
dev_kfree_skb_any(wl->current_beacon);
wl->current_beacon = beacon;
wl->beacon0_uploaded = false;
wl->beacon1_uploaded = false;
ieee80211_queue_work(wl->hw, &wl->beacon_update_trigger);
}
static void b43legacy_set_beacon_int(struct b43legacy_wldev *dev,
u16 beacon_int)
{
b43legacy_time_lock(dev);
if (dev->dev->id.revision >= 3) {
b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_REP,
(beacon_int << 16));
b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_START,
(beacon_int << 10));
} else {
b43legacy_write16(dev, 0x606, (beacon_int >> 6));
b43legacy_write16(dev, 0x610, beacon_int);
}
b43legacy_time_unlock(dev);
b43legacydbg(dev->wl, "Set beacon interval to %u\n", beacon_int);
}
static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
{
}
/* Interrupt handler bottom-half */
static void b43legacy_interrupt_tasklet(struct tasklet_struct *t)
{
struct b43legacy_wldev *dev = from_tasklet(dev, t, isr_tasklet);
u32 reason;
u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
u32 merged_dma_reason = 0;
int i;
unsigned long flags;
spin_lock_irqsave(&dev->wl->irq_lock, flags);
B43legacy_WARN_ON(b43legacy_status(dev) <
B43legacy_STAT_INITIALIZED);
reason = dev->irq_reason;
for (i = 0; i < ARRAY_SIZE(dma_reason); i++) {
dma_reason[i] = dev->dma_reason[i];
merged_dma_reason |= dma_reason[i];
}
if (unlikely(reason & B43legacy_IRQ_MAC_TXERR))
b43legacyerr(dev->wl, "MAC transmission error\n");
if (unlikely(reason & B43legacy_IRQ_PHY_TXERR)) {
b43legacyerr(dev->wl, "PHY transmission error\n");
rmb();
if (unlikely(atomic_dec_and_test(&dev->phy.txerr_cnt))) {
b43legacyerr(dev->wl, "Too many PHY TX errors, "
"restarting the controller\n");
b43legacy_controller_restart(dev, "PHY TX errors");
}
}
if (unlikely(merged_dma_reason & (B43legacy_DMAIRQ_FATALMASK |
B43legacy_DMAIRQ_NONFATALMASK))) {
if (merged_dma_reason & B43legacy_DMAIRQ_FATALMASK) {
b43legacyerr(dev->wl, "Fatal DMA error: "
"0x%08X, 0x%08X, 0x%08X, "
"0x%08X, 0x%08X, 0x%08X\n",
dma_reason[0], dma_reason[1],
dma_reason[2], dma_reason[3],
dma_reason[4], dma_reason[5]);
b43legacy_controller_restart(dev, "DMA error");
spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
return;
}
if (merged_dma_reason & B43legacy_DMAIRQ_NONFATALMASK)
b43legacyerr(dev->wl, "DMA error: "
"0x%08X, 0x%08X, 0x%08X, "
"0x%08X, 0x%08X, 0x%08X\n",
dma_reason[0], dma_reason[1],
dma_reason[2], dma_reason[3],
dma_reason[4], dma_reason[5]);
}
if (unlikely(reason & B43legacy_IRQ_UCODE_DEBUG))
handle_irq_ucode_debug(dev);
if (reason & B43legacy_IRQ_TBTT_INDI)
handle_irq_tbtt_indication(dev);
if (reason & B43legacy_IRQ_ATIM_END)
handle_irq_atim_end(dev);
if (reason & B43legacy_IRQ_BEACON)
handle_irq_beacon(dev);
if (reason & B43legacy_IRQ_PMQ)
handle_irq_pmq(dev);
if (reason & B43legacy_IRQ_TXFIFO_FLUSH_OK) {
;/*TODO*/
}
if (reason & B43legacy_IRQ_NOISESAMPLE_OK)
handle_irq_noise(dev);
/* Check the DMA reason registers for received data. */
if (dma_reason[0] & B43legacy_DMAIRQ_RX_DONE) {
if (b43legacy_using_pio(dev))
b43legacy_pio_rx(dev->pio.queue0);
else
b43legacy_dma_rx(dev->dma.rx_ring0);
}
B43legacy_WARN_ON(dma_reason[1] & B43legacy_DMAIRQ_RX_DONE);
B43legacy_WARN_ON(dma_reason[2] & B43legacy_DMAIRQ_RX_DONE);
if (dma_reason[3] & B43legacy_DMAIRQ_RX_DONE) {
if (b43legacy_using_pio(dev))
b43legacy_pio_rx(dev->pio.queue3);
else
b43legacy_dma_rx(dev->dma.rx_ring3);
}
B43legacy_WARN_ON(dma_reason[4] & B43legacy_DMAIRQ_RX_DONE);
B43legacy_WARN_ON(dma_reason[5] & B43legacy_DMAIRQ_RX_DONE);
if (reason & B43legacy_IRQ_TX_OK)
handle_irq_transmit_status(dev);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
}
static void pio_irq_workaround(struct b43legacy_wldev *dev,
u16 base, int queueidx)
{
u16 rxctl;
rxctl = b43legacy_read16(dev, base + B43legacy_PIO_RXCTL);
if (rxctl & B43legacy_PIO_RXCTL_DATAAVAILABLE)
dev->dma_reason[queueidx] |= B43legacy_DMAIRQ_RX_DONE;
else
dev->dma_reason[queueidx] &= ~B43legacy_DMAIRQ_RX_DONE;
}
static void b43legacy_interrupt_ack(struct b43legacy_wldev *dev, u32 reason)
{
if (b43legacy_using_pio(dev) &&
(dev->dev->id.revision < 3) &&
(!(reason & B43legacy_IRQ_PIO_WORKAROUND))) {
/* Apply a PIO specific workaround to the dma_reasons */
pio_irq_workaround(dev, B43legacy_MMIO_PIO1_BASE, 0);
pio_irq_workaround(dev, B43legacy_MMIO_PIO2_BASE, 1);
pio_irq_workaround(dev, B43legacy_MMIO_PIO3_BASE, 2);
pio_irq_workaround(dev, B43legacy_MMIO_PIO4_BASE, 3);
}
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, reason);
b43legacy_write32(dev, B43legacy_MMIO_DMA0_REASON,
dev->dma_reason[0]);
b43legacy_write32(dev, B43legacy_MMIO_DMA1_REASON,
dev->dma_reason[1]);
b43legacy_write32(dev, B43legacy_MMIO_DMA2_REASON,
dev->dma_reason[2]);
b43legacy_write32(dev, B43legacy_MMIO_DMA3_REASON,
dev->dma_reason[3]);
b43legacy_write32(dev, B43legacy_MMIO_DMA4_REASON,
dev->dma_reason[4]);
b43legacy_write32(dev, B43legacy_MMIO_DMA5_REASON,
dev->dma_reason[5]);
}
/* Interrupt handler top-half */
static irqreturn_t b43legacy_interrupt_handler(int irq, void *dev_id)
{
irqreturn_t ret = IRQ_NONE;
struct b43legacy_wldev *dev = dev_id;
u32 reason;
B43legacy_WARN_ON(!dev);
spin_lock(&dev->wl->irq_lock);
if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
/* This can only happen on shared IRQ lines. */
goto out;
reason = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
if (reason == 0xffffffff) /* shared IRQ */
goto out;
ret = IRQ_HANDLED;
reason &= dev->irq_mask;
if (!reason)
goto out;
dev->dma_reason[0] = b43legacy_read32(dev,
B43legacy_MMIO_DMA0_REASON)
& 0x0001DC00;
dev->dma_reason[1] = b43legacy_read32(dev,
B43legacy_MMIO_DMA1_REASON)
& 0x0000DC00;
dev->dma_reason[2] = b43legacy_read32(dev,
B43legacy_MMIO_DMA2_REASON)
& 0x0000DC00;
dev->dma_reason[3] = b43legacy_read32(dev,
B43legacy_MMIO_DMA3_REASON)
& 0x0001DC00;
dev->dma_reason[4] = b43legacy_read32(dev,
B43legacy_MMIO_DMA4_REASON)
& 0x0000DC00;
dev->dma_reason[5] = b43legacy_read32(dev,
B43legacy_MMIO_DMA5_REASON)
& 0x0000DC00;
b43legacy_interrupt_ack(dev, reason);
/* Disable all IRQs. They are enabled again in the bottom half. */
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
/* Save the reason code and call our bottom half. */
dev->irq_reason = reason;
tasklet_schedule(&dev->isr_tasklet);
out:
spin_unlock(&dev->wl->irq_lock);
return ret;
}
static void b43legacy_release_firmware(struct b43legacy_wldev *dev)
{
release_firmware(dev->fw.ucode);
dev->fw.ucode = NULL;
release_firmware(dev->fw.pcm);
dev->fw.pcm = NULL;
release_firmware(dev->fw.initvals);
dev->fw.initvals = NULL;
release_firmware(dev->fw.initvals_band);
dev->fw.initvals_band = NULL;
}
static void b43legacy_print_fw_helptext(struct b43legacy_wl *wl)
{
b43legacyerr(wl, "You must go to https://wireless.wiki.kernel.org/en/"
"users/Drivers/b43#devicefirmware "
"and download the correct firmware (version 3).\n");
}
static void b43legacy_fw_cb(const struct firmware *firmware, void *context)
{
struct b43legacy_wldev *dev = context;
dev->fwp = firmware;
complete(&dev->fw_load_complete);
}
static int do_request_fw(struct b43legacy_wldev *dev,
const char *name,
const struct firmware **fw, bool async)
{
char path[sizeof(modparam_fwpostfix) + 32];
struct b43legacy_fw_header *hdr;
u32 size;
int err;
if (!name)
return 0;
snprintf(path, ARRAY_SIZE(path),
"b43legacy%s/%s.fw",
modparam_fwpostfix, name);
b43legacyinfo(dev->wl, "Loading firmware %s\n", path);
if (async) {
init_completion(&dev->fw_load_complete);
err = request_firmware_nowait(THIS_MODULE, 1, path,
dev->dev->dev, GFP_KERNEL,
dev, b43legacy_fw_cb);
if (err) {
b43legacyerr(dev->wl, "Unable to load firmware\n");
return err;
}
/* stall here until fw ready */
wait_for_completion(&dev->fw_load_complete);
if (!dev->fwp)
err = -EINVAL;
*fw = dev->fwp;
} else {
err = request_firmware(fw, path, dev->dev->dev);
}
if (err) {
b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
"or load failed.\n", path);
return err;
}
if ((*fw)->size < sizeof(struct b43legacy_fw_header))
goto err_format;
hdr = (struct b43legacy_fw_header *)((*fw)->data);
switch (hdr->type) {
case B43legacy_FW_TYPE_UCODE:
case B43legacy_FW_TYPE_PCM:
size = be32_to_cpu(hdr->size);
if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
goto err_format;
fallthrough;
case B43legacy_FW_TYPE_IV:
if (hdr->ver != 1)
goto err_format;
break;
default:
goto err_format;
}
return err;
err_format:
b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
return -EPROTO;
}
static int b43legacy_one_core_attach(struct ssb_device *dev,
struct b43legacy_wl *wl);
static void b43legacy_one_core_detach(struct ssb_device *dev);
static void b43legacy_request_firmware(struct work_struct *work)
{
struct b43legacy_wl *wl = container_of(work,
struct b43legacy_wl, firmware_load);
struct b43legacy_wldev *dev = wl->current_dev;
struct b43legacy_firmware *fw = &dev->fw;
const u8 rev = dev->dev->id.revision;
const char *filename;
int err;
if (!fw->ucode) {
if (rev == 2)
filename = "ucode2";
else if (rev == 4)
filename = "ucode4";
else
filename = "ucode5";
err = do_request_fw(dev, filename, &fw->ucode, true);
if (err)
goto err_load;
}
if (!fw->pcm) {
if (rev < 5)
filename = "pcm4";
else
filename = "pcm5";
err = do_request_fw(dev, filename, &fw->pcm, false);
if (err)
goto err_load;
}
if (!fw->initvals) {
switch (dev->phy.type) {
case B43legacy_PHYTYPE_B:
case B43legacy_PHYTYPE_G:
if ((rev >= 5) && (rev <= 10))
filename = "b0g0initvals5";
else if (rev == 2 || rev == 4)
filename = "b0g0initvals2";
else
goto err_no_initvals;
break;
default:
goto err_no_initvals;
}
err = do_request_fw(dev, filename, &fw->initvals, false);
if (err)
goto err_load;
}
if (!fw->initvals_band) {
switch (dev->phy.type) {
case B43legacy_PHYTYPE_B:
case B43legacy_PHYTYPE_G:
if ((rev >= 5) && (rev <= 10))
filename = "b0g0bsinitvals5";
else if (rev >= 11)
filename = NULL;
else if (rev == 2 || rev == 4)
filename = NULL;
else
goto err_no_initvals;
break;
default:
goto err_no_initvals;
}
err = do_request_fw(dev, filename, &fw->initvals_band, false);
if (err)
goto err_load;
}
err = ieee80211_register_hw(wl->hw);
if (err)
goto err_one_core_detach;
return;
err_one_core_detach:
b43legacy_one_core_detach(dev->dev);
goto error;
err_load:
b43legacy_print_fw_helptext(dev->wl);
goto error;
err_no_initvals:
err = -ENODEV;
b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
"core rev %u\n", dev->phy.type, rev);
goto error;
error:
b43legacy_release_firmware(dev);
return;
}
static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
{
struct wiphy *wiphy = dev->wl->hw->wiphy;
const size_t hdr_len = sizeof(struct b43legacy_fw_header);
const __be32 *data;
unsigned int i;
unsigned int len;
u16 fwrev;
u16 fwpatch;
u16 fwdate;
u16 fwtime;
u32 tmp, macctl;
int err = 0;
/* Jump the microcode PSM to offset 0 */
macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
macctl |= B43legacy_MACCTL_PSM_JMP0;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
/* Zero out all microcode PSM registers and shared memory. */
for (i = 0; i < 64; i++)
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
for (i = 0; i < 4096; i += 2)
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);
/* Upload Microcode. */
data = (__be32 *) (dev->fw.ucode->data + hdr_len);
len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
b43legacy_shm_control_word(dev,
B43legacy_SHM_UCODE |
B43legacy_SHM_AUTOINC_W,
0x0000);
for (i = 0; i < len; i++) {
b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
be32_to_cpu(data[i]));
udelay(10);
}
if (dev->fw.pcm) {
/* Upload PCM data. */
data = (__be32 *) (dev->fw.pcm->data + hdr_len);
len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
/* No need for autoinc bit in SHM_HW */
b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
for (i = 0; i < len; i++) {
b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
be32_to_cpu(data[i]));
udelay(10);
}
}
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
B43legacy_IRQ_ALL);
/* Start the microcode PSM */
macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
macctl &= ~B43legacy_MACCTL_PSM_JMP0;
macctl |= B43legacy_MACCTL_PSM_RUN;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
/* Wait for the microcode to load and respond */
i = 0;
while (1) {
tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
break;
i++;
if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
b43legacyerr(dev->wl, "Microcode not responding\n");
b43legacy_print_fw_helptext(dev->wl);
err = -ENODEV;
goto error;
}
msleep_interruptible(50);
if (signal_pending(current)) {
err = -EINTR;
goto error;
}
}
/* dummy read follows */
b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
/* Get and check the revisions. */
fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_UCODEREV);
fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_UCODEPATCH);
fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_UCODEDATE);
fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_UCODETIME);
if (fwrev > 0x128) {
b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
" Only firmware from binary drivers version 3.x"
" is supported. You must change your firmware"
" files.\n");
b43legacy_print_fw_helptext(dev->wl);
err = -EOPNOTSUPP;
goto error;
}
b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
"(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
(fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
(fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
fwtime & 0x1F);
dev->fw.rev = fwrev;
dev->fw.patch = fwpatch;
snprintf(wiphy->fw_version, sizeof(wiphy->fw_version), "%u.%u",
dev->fw.rev, dev->fw.patch);
wiphy->hw_version = dev->dev->id.coreid;
return 0;
error:
macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
macctl &= ~B43legacy_MACCTL_PSM_RUN;
macctl |= B43legacy_MACCTL_PSM_JMP0;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
return err;
}
static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
const struct b43legacy_iv *ivals,
size_t count,
size_t array_size)
{
const struct b43legacy_iv *iv;
u16 offset;
size_t i;
bool bit32;
BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
iv = ivals;
for (i = 0; i < count; i++) {
if (array_size < sizeof(iv->offset_size))
goto err_format;
array_size -= sizeof(iv->offset_size);
offset = be16_to_cpu(iv->offset_size);
bit32 = !!(offset & B43legacy_IV_32BIT);
offset &= B43legacy_IV_OFFSET_MASK;
if (offset >= 0x1000)
goto err_format;
if (bit32) {
u32 value;
if (array_size < sizeof(iv->data.d32))
goto err_format;
array_size -= sizeof(iv->data.d32);
value = get_unaligned_be32(&iv->data.d32);
b43legacy_write32(dev, offset, value);
iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
sizeof(__be16) +
sizeof(__be32));
} else {
u16 value;
if (array_size < sizeof(iv->data.d16))
goto err_format;
array_size -= sizeof(iv->data.d16);
value = be16_to_cpu(iv->data.d16);
b43legacy_write16(dev, offset, value);
iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
sizeof(__be16) +
sizeof(__be16));
}
}
if (array_size)
goto err_format;
return 0;
err_format:
b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
b43legacy_print_fw_helptext(dev->wl);
return -EPROTO;
}
static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
{
const size_t hdr_len = sizeof(struct b43legacy_fw_header);
const struct b43legacy_fw_header *hdr;
struct b43legacy_firmware *fw = &dev->fw;
const struct b43legacy_iv *ivals;
size_t count;
int err;
hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
count = be32_to_cpu(hdr->size);
err = b43legacy_write_initvals(dev, ivals, count,
fw->initvals->size - hdr_len);
if (err)
goto out;
if (fw->initvals_band) {
hdr = (const struct b43legacy_fw_header *)
(fw->initvals_band->data);
ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
+ hdr_len);
count = be32_to_cpu(hdr->size);
err = b43legacy_write_initvals(dev, ivals, count,
fw->initvals_band->size - hdr_len);
if (err)
goto out;
}
out:
return err;
}
/* Initialize the GPIOs
* https://bcm-specs.sipsolutions.net/GPIO
*/
static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
{
struct ssb_bus *bus = dev->dev->bus;
struct ssb_device *gpiodev, *pcidev = NULL;
u32 mask;
u32 set;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
b43legacy_read32(dev,
B43legacy_MMIO_MACCTL)
& 0xFFFF3FFF);
b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
b43legacy_read16(dev,
B43legacy_MMIO_GPIO_MASK)
| 0x000F);
mask = 0x0000001F;
set = 0x0000000F;
if (dev->dev->bus->chip_id == 0x4301) {
mask |= 0x0060;
set |= 0x0060;
}
if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
b43legacy_read16(dev,
B43legacy_MMIO_GPIO_MASK)
| 0x0200);
mask |= 0x0200;
set |= 0x0200;
}
if (dev->dev->id.revision >= 2)
mask |= 0x0010; /* FIXME: This is redundant. */
#ifdef CONFIG_SSB_DRIVER_PCICORE
pcidev = bus->pcicore.dev;
#endif
gpiodev = bus->chipco.dev ? : pcidev;
if (!gpiodev)
return 0;
ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
(ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
& ~mask) | set);
return 0;
}
/* Turn off all GPIO stuff. Call this on module unload, for example. */
static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
{
struct ssb_bus *bus = dev->dev->bus;
struct ssb_device *gpiodev, *pcidev = NULL;
#ifdef CONFIG_SSB_DRIVER_PCICORE
pcidev = bus->pcicore.dev;
#endif
gpiodev = bus->chipco.dev ? : pcidev;
if (!gpiodev)
return;
ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
}
/* http://bcm-specs.sipsolutions.net/EnableMac */
void b43legacy_mac_enable(struct b43legacy_wldev *dev)
{
dev->mac_suspended--;
B43legacy_WARN_ON(dev->mac_suspended < 0);
B43legacy_WARN_ON(irqs_disabled());
if (dev->mac_suspended == 0) {
b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
b43legacy_read32(dev,
B43legacy_MMIO_MACCTL)
| B43legacy_MACCTL_ENABLED);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
B43legacy_IRQ_MAC_SUSPENDED);
/* the next two are dummy reads */
b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
b43legacy_power_saving_ctl_bits(dev, -1, -1);
/* Re-enable IRQs. */
spin_lock_irq(&dev->wl->irq_lock);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
dev->irq_mask);
spin_unlock_irq(&dev->wl->irq_lock);
}
}
/* https://bcm-specs.sipsolutions.net/SuspendMAC */
void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
{
int i;
u32 tmp;
might_sleep();
B43legacy_WARN_ON(irqs_disabled());
B43legacy_WARN_ON(dev->mac_suspended < 0);
if (dev->mac_suspended == 0) {
/* Mask IRQs before suspending MAC. Otherwise
* the MAC stays busy and won't suspend. */
spin_lock_irq(&dev->wl->irq_lock);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
spin_unlock_irq(&dev->wl->irq_lock);
b43legacy_synchronize_irq(dev);
b43legacy_power_saving_ctl_bits(dev, -1, 1);
b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
b43legacy_read32(dev,
B43legacy_MMIO_MACCTL)
& ~B43legacy_MACCTL_ENABLED);
b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
for (i = 40; i; i--) {
tmp = b43legacy_read32(dev,
B43legacy_MMIO_GEN_IRQ_REASON);
if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
goto out;
msleep(1);
}
b43legacyerr(dev->wl, "MAC suspend failed\n");
}
out:
dev->mac_suspended++;
}
static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
u32 ctl;
u16 cfp_pretbtt;
ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
/* Reset status to STA infrastructure mode. */
ctl &= ~B43legacy_MACCTL_AP;
ctl &= ~B43legacy_MACCTL_KEEP_CTL;
ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
ctl &= ~B43legacy_MACCTL_KEEP_BAD;
ctl &= ~B43legacy_MACCTL_PROMISC;
ctl &= ~B43legacy_MACCTL_BEACPROMISC;
ctl |= B43legacy_MACCTL_INFRA;
if (b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
ctl |= B43legacy_MACCTL_AP;
else if (b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC))
ctl &= ~B43legacy_MACCTL_INFRA;
if (wl->filter_flags & FIF_CONTROL)
ctl |= B43legacy_MACCTL_KEEP_CTL;
if (wl->filter_flags & FIF_FCSFAIL)
ctl |= B43legacy_MACCTL_KEEP_BAD;
if (wl->filter_flags & FIF_PLCPFAIL)
ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
ctl |= B43legacy_MACCTL_BEACPROMISC;
/* Workaround: On old hardware the HW-MAC-address-filter
* doesn't work properly, so always run promisc in filter
* it in software. */
if (dev->dev->id.revision <= 4)
ctl |= B43legacy_MACCTL_PROMISC;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);
cfp_pretbtt = 2;
if ((ctl & B43legacy_MACCTL_INFRA) &&
!(ctl & B43legacy_MACCTL_AP)) {
if (dev->dev->bus->chip_id == 0x4306 &&
dev->dev->bus->chip_rev == 3)
cfp_pretbtt = 100;
else
cfp_pretbtt = 50;
}
b43legacy_write16(dev, 0x612, cfp_pretbtt);
}
static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
u16 rate,
int is_ofdm)
{
u16 offset;
if (is_ofdm) {
offset = 0x480;
offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
} else {
offset = 0x4C0;
offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
}
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
b43legacy_shm_read16(dev,
B43legacy_SHM_SHARED, offset));
}
static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
{
switch (dev->phy.type) {
case B43legacy_PHYTYPE_G:
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
fallthrough;
case B43legacy_PHYTYPE_B:
b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
break;
default:
B43legacy_BUG_ON(1);
}
}
/* Set the TX-Antenna for management frames sent by firmware. */
static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
int antenna)
{
u16 ant = 0;
u16 tmp;
switch (antenna) {
case B43legacy_ANTENNA0:
ant |= B43legacy_TX4_PHY_ANT0;
break;
case B43legacy_ANTENNA1:
ant |= B43legacy_TX4_PHY_ANT1;
break;
case B43legacy_ANTENNA_AUTO:
ant |= B43legacy_TX4_PHY_ANTLAST;
break;
default:
B43legacy_BUG_ON(1);
}
/* FIXME We also need to set the other flags of the PHY control
* field somewhere. */
/* For Beacons */
tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_BEACPHYCTL);
tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_BEACPHYCTL, tmp);
/* For ACK/CTS */
tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_ACKCTSPHYCTL);
tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
/* For Probe Resposes */
tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_PRPHYCTL);
tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_PRPHYCTL, tmp);
}
/* This is the opposite of b43legacy_chip_init() */
static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
{
b43legacy_radio_turn_off(dev, 1);
b43legacy_gpio_cleanup(dev);
/* firmware is released later */
}
/* Initialize the chip
* https://bcm-specs.sipsolutions.net/ChipInit
*/
static int b43legacy_chip_init(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
int err;
int tmp;
u32 value32, macctl;
u16 value16;
/* Initialize the MAC control */
macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
if (dev->phy.gmode)
macctl |= B43legacy_MACCTL_GMODE;
macctl |= B43legacy_MACCTL_INFRA;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
err = b43legacy_upload_microcode(dev);
if (err)
goto out; /* firmware is released later */
err = b43legacy_gpio_init(dev);
if (err)
goto out; /* firmware is released later */
err = b43legacy_upload_initvals(dev);
if (err)
goto err_gpio_clean;
b43legacy_radio_turn_on(dev);
b43legacy_write16(dev, 0x03E6, 0x0000);
err = b43legacy_phy_init(dev);
if (err)
goto err_radio_off;
/* Select initial Interference Mitigation. */
tmp = phy->interfmode;
phy->interfmode = B43legacy_INTERFMODE_NONE;
b43legacy_radio_set_interference_mitigation(dev, tmp);
b43legacy_phy_set_antenna_diversity(dev);
b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);
if (phy->type == B43legacy_PHYTYPE_B) {
value16 = b43legacy_read16(dev, 0x005E);
value16 |= 0x0004;
b43legacy_write16(dev, 0x005E, value16);
}
b43legacy_write32(dev, 0x0100, 0x01000000);
if (dev->dev->id.revision < 5)
b43legacy_write32(dev, 0x010C, 0x01000000);
value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
value32 &= ~B43legacy_MACCTL_INFRA;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
value32 |= B43legacy_MACCTL_INFRA;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
if (b43legacy_using_pio(dev)) {
b43legacy_write32(dev, 0x0210, 0x00000100);
b43legacy_write32(dev, 0x0230, 0x00000100);
b43legacy_write32(dev, 0x0250, 0x00000100);
b43legacy_write32(dev, 0x0270, 0x00000100);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
0x0000);
}
/* Probe Response Timeout value */
/* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);
/* Initially set the wireless operation mode. */
b43legacy_adjust_opmode(dev);
if (dev->dev->id.revision < 3) {
b43legacy_write16(dev, 0x060E, 0x0000);
b43legacy_write16(dev, 0x0610, 0x8000);
b43legacy_write16(dev, 0x0604, 0x0000);
b43legacy_write16(dev, 0x0606, 0x0200);
} else {
b43legacy_write32(dev, 0x0188, 0x80000000);
b43legacy_write32(dev, 0x018C, 0x02000000);
}
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);
value32 = ssb_read32(dev->dev, SSB_TMSLOW);
value32 |= B43legacy_TMSLOW_MACPHYCLKEN;
ssb_write32(dev->dev, SSB_TMSLOW, value32);
b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
dev->dev->bus->chipco.fast_pwrup_delay);
/* PHY TX errors counter. */
atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
B43legacy_WARN_ON(err != 0);
b43legacydbg(dev->wl, "Chip initialized\n");
out:
return err;
err_radio_off:
b43legacy_radio_turn_off(dev, 1);
err_gpio_clean:
b43legacy_gpio_cleanup(dev);
goto out;
}
static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
return;
b43legacy_mac_suspend(dev);
b43legacy_phy_lo_g_measure(dev);
b43legacy_mac_enable(dev);
}
static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
{
b43legacy_phy_lo_mark_all_unused(dev);
if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
b43legacy_mac_suspend(dev);
b43legacy_calc_nrssi_slope(dev);
b43legacy_mac_enable(dev);
}
}
static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
{
/* Update device statistics. */
b43legacy_calculate_link_quality(dev);
}
static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
{
b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */
atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
wmb();
}
static void do_periodic_work(struct b43legacy_wldev *dev)
{
unsigned int state;
state = dev->periodic_state;
if (state % 8 == 0)
b43legacy_periodic_every120sec(dev);
if (state % 4 == 0)
b43legacy_periodic_every60sec(dev);
if (state % 2 == 0)
b43legacy_periodic_every30sec(dev);
b43legacy_periodic_every15sec(dev);
}
/* Periodic work locking policy:
* The whole periodic work handler is protected by
* wl->mutex. If another lock is needed somewhere in the
* pwork callchain, it's acquired in-place, where it's needed.
*/
static void b43legacy_periodic_work_handler(struct work_struct *work)
{
struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
periodic_work.work);
struct b43legacy_wl *wl = dev->wl;
unsigned long delay;
mutex_lock(&wl->mutex);
if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
goto out;
if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
goto out_requeue;
do_periodic_work(dev);
dev->periodic_state++;
out_requeue:
if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
delay = msecs_to_jiffies(50);
else
delay = round_jiffies_relative(HZ * 15);
ieee80211_queue_delayed_work(wl->hw, &dev->periodic_work, delay);
out:
mutex_unlock(&wl->mutex);
}
static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
{
struct delayed_work *work = &dev->periodic_work;
dev->periodic_state = 0;
INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
ieee80211_queue_delayed_work(dev->wl->hw, work, 0);
}
/* Validate access to the chip (SHM) */
static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
{
u32 value;
u32 shm_backup;
shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
0xAA5555AA)
goto error;
b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
0x55AAAA55)
goto error;
b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);
value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
if ((value | B43legacy_MACCTL_GMODE) !=
(B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
goto error;
value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
if (value)
goto error;
return 0;
error:
b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
return -ENODEV;
}
static void b43legacy_security_init(struct b43legacy_wldev *dev)
{
dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
0x0056);
/* KTP is a word address, but we address SHM bytewise.
* So multiply by two.
*/
dev->ktp *= 2;
if (dev->dev->id.revision >= 5)
/* Number of RCMTA address slots */
b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
dev->max_nr_keys - 8);
}
#ifdef CONFIG_B43LEGACY_HWRNG
static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
{
struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
unsigned long flags;
/* Don't take wl->mutex here, as it could deadlock with
* hwrng internal locking. It's not needed to take
* wl->mutex here, anyway. */
spin_lock_irqsave(&wl->irq_lock, flags);
*data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
spin_unlock_irqrestore(&wl->irq_lock, flags);
return (sizeof(u16));
}
#endif
static void b43legacy_rng_exit(struct b43legacy_wl *wl)
{
#ifdef CONFIG_B43LEGACY_HWRNG
if (wl->rng_initialized)
hwrng_unregister(&wl->rng);
#endif
}
static int b43legacy_rng_init(struct b43legacy_wl *wl)
{
int err = 0;
#ifdef CONFIG_B43LEGACY_HWRNG
snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
"%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
wl->rng.name = wl->rng_name;
wl->rng.data_read = b43legacy_rng_read;
wl->rng.priv = (unsigned long)wl;
wl->rng_initialized = 1;
err = hwrng_register(&wl->rng);
if (err) {
wl->rng_initialized = 0;
b43legacyerr(wl, "Failed to register the random "
"number generator (%d)\n", err);
}
#endif
return err;
}
static void b43legacy_tx_work(struct work_struct *work)
{
struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
tx_work);
struct b43legacy_wldev *dev;
struct sk_buff *skb;
int queue_num;
int err = 0;
mutex_lock(&wl->mutex);
dev = wl->current_dev;
if (unlikely(!dev || b43legacy_status(dev) < B43legacy_STAT_STARTED)) {
mutex_unlock(&wl->mutex);
return;
}
for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
while (skb_queue_len(&wl->tx_queue[queue_num])) {
skb = skb_dequeue(&wl->tx_queue[queue_num]);
if (b43legacy_using_pio(dev))
err = b43legacy_pio_tx(dev, skb);
else
err = b43legacy_dma_tx(dev, skb);
if (err == -ENOSPC) {
wl->tx_queue_stopped[queue_num] = 1;
ieee80211_stop_queue(wl->hw, queue_num);
skb_queue_head(&wl->tx_queue[queue_num], skb);
break;
}
if (unlikely(err))
dev_kfree_skb(skb); /* Drop it */
err = 0;
}
if (!err)
wl->tx_queue_stopped[queue_num] = 0;
}
mutex_unlock(&wl->mutex);
}
static void b43legacy_op_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
if (unlikely(skb->len < 2 + 2 + 6)) {
/* Too short, this can't be a valid frame. */
dev_kfree_skb_any(skb);
return;
}
B43legacy_WARN_ON(skb_shinfo(skb)->nr_frags);
skb_queue_tail(&wl->tx_queue[skb->queue_mapping], skb);
if (!wl->tx_queue_stopped[skb->queue_mapping])
ieee80211_queue_work(wl->hw, &wl->tx_work);
else
ieee80211_stop_queue(wl->hw, skb->queue_mapping);
}
static int b43legacy_op_conf_tx(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
unsigned int link_id, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
return 0;
}
static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
unsigned long flags;
spin_lock_irqsave(&wl->irq_lock, flags);
memcpy(stats, &wl->ieee_stats, sizeof(*stats));
spin_unlock_irqrestore(&wl->irq_lock, flags);
return 0;
}
static const char *phymode_to_string(unsigned int phymode)
{
switch (phymode) {
case B43legacy_PHYMODE_B:
return "B";
case B43legacy_PHYMODE_G:
return "G";
default:
B43legacy_BUG_ON(1);
}
return "";
}
static int find_wldev_for_phymode(struct b43legacy_wl *wl,
unsigned int phymode,
struct b43legacy_wldev **dev,
bool *gmode)
{
struct b43legacy_wldev *d;
list_for_each_entry(d, &wl->devlist, list) {
if (d->phy.possible_phymodes & phymode) {
/* Ok, this device supports the PHY-mode.
* Set the gmode bit. */
*gmode = true;
*dev = d;
return 0;
}
}
return -ESRCH;
}
static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
{
struct ssb_device *sdev = dev->dev;
u32 tmslow;
tmslow = ssb_read32(sdev, SSB_TMSLOW);
tmslow &= ~B43legacy_TMSLOW_GMODE;
tmslow |= B43legacy_TMSLOW_PHYRESET;
tmslow |= SSB_TMSLOW_FGC;
ssb_write32(sdev, SSB_TMSLOW, tmslow);
msleep(1);
tmslow = ssb_read32(sdev, SSB_TMSLOW);
tmslow &= ~SSB_TMSLOW_FGC;
tmslow |= B43legacy_TMSLOW_PHYRESET;
ssb_write32(sdev, SSB_TMSLOW, tmslow);
msleep(1);
}
/* Expects wl->mutex locked */
static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
unsigned int new_mode)
{
struct b43legacy_wldev *up_dev;
struct b43legacy_wldev *down_dev;
int err;
bool gmode = false;
int prev_status;
err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
if (err) {
b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
phymode_to_string(new_mode));
return err;
}
if ((up_dev == wl->current_dev) &&
(!!wl->current_dev->phy.gmode == !!gmode))
/* This device is already running. */
return 0;
b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
phymode_to_string(new_mode));
down_dev = wl->current_dev;
prev_status = b43legacy_status(down_dev);
/* Shutdown the currently running core. */
if (prev_status >= B43legacy_STAT_STARTED)
b43legacy_wireless_core_stop(down_dev);
if (prev_status >= B43legacy_STAT_INITIALIZED)
b43legacy_wireless_core_exit(down_dev);
if (down_dev != up_dev)
/* We switch to a different core, so we put PHY into
* RESET on the old core. */
b43legacy_put_phy_into_reset(down_dev);
/* Now start the new core. */
up_dev->phy.gmode = gmode;
if (prev_status >= B43legacy_STAT_INITIALIZED) {
err = b43legacy_wireless_core_init(up_dev);
if (err) {
b43legacyerr(wl, "Fatal: Could not initialize device"
" for newly selected %s-PHY mode\n",
phymode_to_string(new_mode));
goto init_failure;
}
}
if (prev_status >= B43legacy_STAT_STARTED) {
err = b43legacy_wireless_core_start(up_dev);
if (err) {
b43legacyerr(wl, "Fatal: Could not start device for "
"newly selected %s-PHY mode\n",
phymode_to_string(new_mode));
b43legacy_wireless_core_exit(up_dev);
goto init_failure;
}
}
B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);
b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);
wl->current_dev = up_dev;
return 0;
init_failure:
/* Whoops, failed to init the new core. No core is operating now. */
wl->current_dev = NULL;
return err;
}
/* Write the short and long frame retry limit values. */
static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
unsigned int short_retry,
unsigned int long_retry)
{
/* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
* the chip-internal counter. */
short_retry = min(short_retry, (unsigned int)0xF);
long_retry = min(long_retry, (unsigned int)0xF);
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
}
static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
u32 changed)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev;
struct b43legacy_phy *phy;
struct ieee80211_conf *conf = &hw->conf;
unsigned long flags;
unsigned int new_phymode = 0xFFFF;
int antenna_tx;
int err = 0;
antenna_tx = B43legacy_ANTENNA_DEFAULT;
mutex_lock(&wl->mutex);
dev = wl->current_dev;
phy = &dev->phy;
if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
b43legacy_set_retry_limits(dev,
conf->short_frame_max_tx_count,
conf->long_frame_max_tx_count);
changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
if (!changed)
goto out_unlock_mutex;
/* Switch the PHY mode (if necessary). */
switch (conf->chandef.chan->band) {
case NL80211_BAND_2GHZ:
if (phy->type == B43legacy_PHYTYPE_B)
new_phymode = B43legacy_PHYMODE_B;
else
new_phymode = B43legacy_PHYMODE_G;
break;
default:
B43legacy_WARN_ON(1);
}
err = b43legacy_switch_phymode(wl, new_phymode);
if (err)
goto out_unlock_mutex;
/* Disable IRQs while reconfiguring the device.
* This makes it possible to drop the spinlock throughout
* the reconfiguration process. */
spin_lock_irqsave(&wl->irq_lock, flags);
if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
spin_unlock_irqrestore(&wl->irq_lock, flags);
goto out_unlock_mutex;
}
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
spin_unlock_irqrestore(&wl->irq_lock, flags);
b43legacy_synchronize_irq(dev);
/* Switch to the requested channel.
* The firmware takes care of races with the TX handler. */
if (conf->chandef.chan->hw_value != phy->channel)
b43legacy_radio_selectchannel(dev, conf->chandef.chan->hw_value,
0);
dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_MONITOR);
/* Adjust the desired TX power level. */
if (conf->power_level != 0) {
if (conf->power_level != phy->power_level) {
phy->power_level = conf->power_level;
b43legacy_phy_xmitpower(dev);
}
}
/* Antennas for RX and management frame TX. */
b43legacy_mgmtframe_txantenna(dev, antenna_tx);
if (wl->radio_enabled != phy->radio_on) {
if (wl->radio_enabled) {
b43legacy_radio_turn_on(dev);
b43legacyinfo(dev->wl, "Radio turned on by software\n");
if (!dev->radio_hw_enable)
b43legacyinfo(dev->wl, "The hardware RF-kill"
" button still turns the radio"
" physically off. Press the"
" button to turn it on.\n");
} else {
b43legacy_radio_turn_off(dev, 0);
b43legacyinfo(dev->wl, "Radio turned off by"
" software\n");
}
}
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
spin_unlock_irqrestore(&wl->irq_lock, flags);
out_unlock_mutex:
mutex_unlock(&wl->mutex);
return err;
}
static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
{
struct ieee80211_supported_band *sband =
dev->wl->hw->wiphy->bands[NL80211_BAND_2GHZ];
const struct ieee80211_rate *rate;
int i;
u16 basic, direct, offset, basic_offset, rateptr;
for (i = 0; i < sband->n_bitrates; i++) {
rate = &sband->bitrates[i];
if (b43legacy_is_cck_rate(rate->hw_value)) {
direct = B43legacy_SHM_SH_CCKDIRECT;
basic = B43legacy_SHM_SH_CCKBASIC;
offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
offset &= 0xF;
} else {
direct = B43legacy_SHM_SH_OFDMDIRECT;
basic = B43legacy_SHM_SH_OFDMBASIC;
offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
offset &= 0xF;
}
rate = ieee80211_get_response_rate(sband, brates, rate->bitrate);
if (b43legacy_is_cck_rate(rate->hw_value)) {
basic_offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
basic_offset &= 0xF;
} else {
basic_offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
basic_offset &= 0xF;
}
/*
* Get the pointer that we need to point to
* from the direct map
*/
rateptr = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
direct + 2 * basic_offset);
/* and write it to the basic map */
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
basic + 2 * offset, rateptr);
}
}
static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *conf,
u64 changed)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev;
unsigned long flags;
mutex_lock(&wl->mutex);
B43legacy_WARN_ON(wl->vif != vif);
dev = wl->current_dev;
/* Disable IRQs while reconfiguring the device.
* This makes it possible to drop the spinlock throughout
* the reconfiguration process. */
spin_lock_irqsave(&wl->irq_lock, flags);
if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
spin_unlock_irqrestore(&wl->irq_lock, flags);
goto out_unlock_mutex;
}
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
if (changed & BSS_CHANGED_BSSID) {
b43legacy_synchronize_irq(dev);
if (conf->bssid)
memcpy(wl->bssid, conf->bssid, ETH_ALEN);
else
eth_zero_addr(wl->bssid);
}
if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
if (changed & BSS_CHANGED_BEACON &&
(b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
b43legacy_update_templates(wl);
if (changed & BSS_CHANGED_BSSID)
b43legacy_write_mac_bssid_templates(dev);
}
spin_unlock_irqrestore(&wl->irq_lock, flags);
b43legacy_mac_suspend(dev);
if (changed & BSS_CHANGED_BEACON_INT &&
(b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
b43legacy_set_beacon_int(dev, conf->beacon_int);
if (changed & BSS_CHANGED_BASIC_RATES)
b43legacy_update_basic_rates(dev, conf->basic_rates);
if (changed & BSS_CHANGED_ERP_SLOT) {
if (conf->use_short_slot)
b43legacy_short_slot_timing_enable(dev);
else
b43legacy_short_slot_timing_disable(dev);
}
b43legacy_mac_enable(dev);
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
/* XXX: why? */
spin_unlock_irqrestore(&wl->irq_lock, flags);
out_unlock_mutex:
mutex_unlock(&wl->mutex);
}
static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed,
unsigned int *fflags,u64 multicast)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
unsigned long flags;
if (!dev) {
*fflags = 0;
return;
}
spin_lock_irqsave(&wl->irq_lock, flags);
*fflags &= FIF_ALLMULTI |
FIF_FCSFAIL |
FIF_PLCPFAIL |
FIF_CONTROL |
FIF_OTHER_BSS |
FIF_BCN_PRBRESP_PROMISC;
changed &= FIF_ALLMULTI |
FIF_FCSFAIL |
FIF_PLCPFAIL |
FIF_CONTROL |
FIF_OTHER_BSS |
FIF_BCN_PRBRESP_PROMISC;
wl->filter_flags = *fflags;
if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
b43legacy_adjust_opmode(dev);
spin_unlock_irqrestore(&wl->irq_lock, flags);
}
/* Locking: wl->mutex */
static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
unsigned long flags;
int queue_num;
if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
return;
/* Disable and sync interrupts. We must do this before than
* setting the status to INITIALIZED, as the interrupt handler
* won't care about IRQs then. */
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
spin_unlock_irqrestore(&wl->irq_lock, flags);
b43legacy_synchronize_irq(dev);
b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
mutex_unlock(&wl->mutex);
/* Must unlock as it would otherwise deadlock. No races here.
* Cancel the possibly running self-rearming periodic work. */
cancel_delayed_work_sync(&dev->periodic_work);
cancel_work_sync(&wl->tx_work);
mutex_lock(&wl->mutex);
/* Drain all TX queues. */
for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
while (skb_queue_len(&wl->tx_queue[queue_num]))
dev_kfree_skb(skb_dequeue(&wl->tx_queue[queue_num]));
}
b43legacy_mac_suspend(dev);
free_irq(dev->dev->irq, dev);
b43legacydbg(wl, "Wireless interface stopped\n");
}
/* Locking: wl->mutex */
static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
{
int err;
B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);
drain_txstatus_queue(dev);
err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
IRQF_SHARED, KBUILD_MODNAME, dev);
if (err) {
b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
dev->dev->irq);
goto out;
}
/* We are ready to run. */
ieee80211_wake_queues(dev->wl->hw);
b43legacy_set_status(dev, B43legacy_STAT_STARTED);
/* Start data flow (TX/RX) */
b43legacy_mac_enable(dev);
b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
/* Start maintenance work */
b43legacy_periodic_tasks_setup(dev);
b43legacydbg(dev->wl, "Wireless interface started\n");
out:
return err;
}
/* Get PHY and RADIO versioning numbers */
static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
u32 tmp;
u8 analog_type;
u8 phy_type;
u8 phy_rev;
u16 radio_manuf;
u16 radio_ver;
u16 radio_rev;
int unsupported = 0;
/* Get PHY versioning */
tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
analog_type = (tmp & B43legacy_PHYVER_ANALOG)
>> B43legacy_PHYVER_ANALOG_SHIFT;
phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
phy_rev = (tmp & B43legacy_PHYVER_VERSION);
switch (phy_type) {
case B43legacy_PHYTYPE_B:
if (phy_rev != 2 && phy_rev != 4
&& phy_rev != 6 && phy_rev != 7)
unsupported = 1;
break;
case B43legacy_PHYTYPE_G:
if (phy_rev > 8)
unsupported = 1;
break;
default:
unsupported = 1;
}
if (unsupported) {
b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
"(Analog %u, Type %u, Revision %u)\n",
analog_type, phy_type, phy_rev);
return -EOPNOTSUPP;
}
b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
analog_type, phy_type, phy_rev);
/* Get RADIO versioning */
if (dev->dev->bus->chip_id == 0x4317) {
if (dev->dev->bus->chip_rev == 0)
tmp = 0x3205017F;
else if (dev->dev->bus->chip_rev == 1)
tmp = 0x4205017F;
else
tmp = 0x5205017F;
} else {
b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
B43legacy_RADIOCTL_ID);
tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
tmp <<= 16;
b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
B43legacy_RADIOCTL_ID);
tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
}
radio_manuf = (tmp & 0x00000FFF);
radio_ver = (tmp & 0x0FFFF000) >> 12;
radio_rev = (tmp & 0xF0000000) >> 28;
switch (phy_type) {
case B43legacy_PHYTYPE_B:
if ((radio_ver & 0xFFF0) != 0x2050)
unsupported = 1;
break;
case B43legacy_PHYTYPE_G:
if (radio_ver != 0x2050)
unsupported = 1;
break;
default:
B43legacy_BUG_ON(1);
}
if (unsupported) {
b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
"(Manuf 0x%X, Version 0x%X, Revision %u)\n",
radio_manuf, radio_ver, radio_rev);
return -EOPNOTSUPP;
}
b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
" Revision %u\n", radio_manuf, radio_ver, radio_rev);
phy->radio_manuf = radio_manuf;
phy->radio_ver = radio_ver;
phy->radio_rev = radio_rev;
phy->analog = analog_type;
phy->type = phy_type;
phy->rev = phy_rev;
return 0;
}
static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
struct b43legacy_phy *phy)
{
struct b43legacy_lopair *lo;
int i;
memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
/* Assume the radio is enabled. If it's not enabled, the state will
* immediately get fixed on the first periodic work run. */
dev->radio_hw_enable = true;
phy->savedpctlreg = 0xFFFF;
phy->aci_enable = false;
phy->aci_wlan_automatic = false;
phy->aci_hw_rssi = false;
lo = phy->_lo_pairs;
if (lo)
memset(lo, 0, sizeof(struct b43legacy_lopair) *
B43legacy_LO_COUNT);
phy->max_lb_gain = 0;
phy->trsw_rx_gain = 0;
/* Set default attenuation values. */
phy->bbatt = b43legacy_default_baseband_attenuation(dev);
phy->rfatt = b43legacy_default_radio_attenuation(dev);
phy->txctl1 = b43legacy_default_txctl1(dev);
phy->txpwr_offset = 0;
/* NRSSI */
phy->nrssislope = 0;
for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
phy->nrssi[i] = -1000;
for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
phy->nrssi_lt[i] = i;
phy->lofcal = 0xFFFF;
phy->initval = 0xFFFF;
phy->interfmode = B43legacy_INTERFMODE_NONE;
phy->channel = 0xFF;
}
static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
{
/* Flags */
dev->dfq_valid = false;
/* Stats */
memset(&dev->stats, 0, sizeof(dev->stats));
setup_struct_phy_for_init(dev, &dev->phy);
/* IRQ related flags */
dev->irq_reason = 0;
memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
dev->irq_mask = B43legacy_IRQ_MASKTEMPLATE;
dev->mac_suspended = 1;
/* Noise calculation context */
memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
}
static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
bool idle) {
u16 pu_delay = 1050;
if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC) || idle)
pu_delay = 500;
if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
pu_delay = max(pu_delay, (u16)2400);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_SPUWKUP, pu_delay);
}
/* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
{
u16 pretbtt;
/* The time value is in microseconds. */
if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
pretbtt = 2;
else
pretbtt = 250;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_PRETBTT, pretbtt);
b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
}
/* Shutdown a wireless core */
/* Locking: wl->mutex */
static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
u32 macctl;
B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
return;
b43legacy_set_status(dev, B43legacy_STAT_UNINIT);
/* Stop the microcode PSM. */
macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
macctl &= ~B43legacy_MACCTL_PSM_RUN;
macctl |= B43legacy_MACCTL_PSM_JMP0;
b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
b43legacy_leds_exit(dev);
b43legacy_rng_exit(dev->wl);
b43legacy_pio_free(dev);
b43legacy_dma_free(dev);
b43legacy_chip_exit(dev);
b43legacy_radio_turn_off(dev, 1);
b43legacy_switch_analog(dev, 0);
if (phy->dyn_tssi_tbl)
kfree(phy->tssi2dbm);
kfree(phy->lo_control);
phy->lo_control = NULL;
if (dev->wl->current_beacon) {
dev_kfree_skb_any(dev->wl->current_beacon);
dev->wl->current_beacon = NULL;
}
ssb_device_disable(dev->dev, 0);
ssb_bus_may_powerdown(dev->dev->bus);
}
static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
{
struct b43legacy_phy *phy = &dev->phy;
int i;
/* Set default attenuation values. */
phy->bbatt = b43legacy_default_baseband_attenuation(dev);
phy->rfatt = b43legacy_default_radio_attenuation(dev);
phy->txctl1 = b43legacy_default_txctl1(dev);
phy->txctl2 = 0xFFFF;
phy->txpwr_offset = 0;
/* NRSSI */
phy->nrssislope = 0;
for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
phy->nrssi[i] = -1000;
for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
phy->nrssi_lt[i] = i;
phy->lofcal = 0xFFFF;
phy->initval = 0xFFFF;
phy->aci_enable = false;
phy->aci_wlan_automatic = false;
phy->aci_hw_rssi = false;
phy->antenna_diversity = 0xFFFF;
memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));
/* Flags */
phy->calibrated = 0;
if (phy->_lo_pairs)
memset(phy->_lo_pairs, 0,
sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
}
/* Initialize a wireless core */
static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
struct ssb_bus *bus = dev->dev->bus;
struct b43legacy_phy *phy = &dev->phy;
struct ssb_sprom *sprom = &dev->dev->bus->sprom;
int err;
u32 hf;
u32 tmp;
B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
err = ssb_bus_powerup(bus, 0);
if (err)
goto out;
if (!ssb_device_is_enabled(dev->dev)) {
tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
b43legacy_wireless_core_reset(dev, tmp);
}
if ((phy->type == B43legacy_PHYTYPE_B) ||
(phy->type == B43legacy_PHYTYPE_G)) {
phy->_lo_pairs = kcalloc(B43legacy_LO_COUNT,
sizeof(struct b43legacy_lopair),
GFP_KERNEL);
if (!phy->_lo_pairs)
return -ENOMEM;
}
setup_struct_wldev_for_init(dev);
err = b43legacy_phy_init_tssi2dbm_table(dev);
if (err)
goto err_kfree_lo_control;
/* Enable IRQ routing to this device. */
ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
prepare_phy_data_for_init(dev);
b43legacy_phy_calibrate(dev);
err = b43legacy_chip_init(dev);
if (err)
goto err_kfree_tssitbl;
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_WLCOREREV,
dev->dev->id.revision);
hf = b43legacy_hf_read(dev);
if (phy->type == B43legacy_PHYTYPE_G) {
hf |= B43legacy_HF_SYMW;
if (phy->rev == 1)
hf |= B43legacy_HF_GDCW;
if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
hf |= B43legacy_HF_OFDMPABOOST;
} else if (phy->type == B43legacy_PHYTYPE_B) {
hf |= B43legacy_HF_SYMW;
if (phy->rev >= 2 && phy->radio_ver == 0x2050)
hf &= ~B43legacy_HF_GDCW;
}
b43legacy_hf_write(dev, hf);
b43legacy_set_retry_limits(dev,
B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
B43legacy_DEFAULT_LONG_RETRY_LIMIT);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
0x0044, 3);
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
0x0046, 2);
/* Disable sending probe responses from firmware.
* Setting the MaxTime to one usec will always trigger
* a timeout, so we never send any probe resp.
* A timeout of zero is infinite. */
b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
B43legacy_SHM_SH_PRMAXTIME, 1);
b43legacy_rate_memory_init(dev);
/* Minimum Contention Window */
if (phy->type == B43legacy_PHYTYPE_B)
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
0x0003, 31);
else
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
0x0003, 15);
/* Maximum Contention Window */
b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
0x0004, 1023);
do {
if (b43legacy_using_pio(dev))
err = b43legacy_pio_init(dev);
else {
err = b43legacy_dma_init(dev);
if (!err)
b43legacy_qos_init(dev);
}
} while (err == -EAGAIN);
if (err)
goto err_chip_exit;
b43legacy_set_synth_pu_delay(dev, 1);
ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
b43legacy_upload_card_macaddress(dev);
b43legacy_security_init(dev);
b43legacy_rng_init(wl);
ieee80211_wake_queues(dev->wl->hw);
b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);
b43legacy_leds_init(dev);
out:
return err;
err_chip_exit:
b43legacy_chip_exit(dev);
err_kfree_tssitbl:
if (phy->dyn_tssi_tbl)
kfree(phy->tssi2dbm);
err_kfree_lo_control:
kfree(phy->lo_control);
phy->lo_control = NULL;
ssb_bus_may_powerdown(bus);
B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
return err;
}
static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev;
unsigned long flags;
int err = -EOPNOTSUPP;
/* TODO: allow AP devices to coexist */
if (vif->type != NL80211_IFTYPE_AP &&
vif->type != NL80211_IFTYPE_STATION &&
vif->type != NL80211_IFTYPE_ADHOC)
return -EOPNOTSUPP;
mutex_lock(&wl->mutex);
if (wl->operating)
goto out_mutex_unlock;
b43legacydbg(wl, "Adding Interface type %d\n", vif->type);
dev = wl->current_dev;
wl->operating = true;
wl->vif = vif;
wl->if_type = vif->type;
memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_adjust_opmode(dev);
b43legacy_set_pretbtt(dev);
b43legacy_set_synth_pu_delay(dev, 0);
b43legacy_upload_card_macaddress(dev);
spin_unlock_irqrestore(&wl->irq_lock, flags);
err = 0;
out_mutex_unlock:
mutex_unlock(&wl->mutex);
return err;
}
static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
unsigned long flags;
b43legacydbg(wl, "Removing Interface type %d\n", vif->type);
mutex_lock(&wl->mutex);
B43legacy_WARN_ON(!wl->operating);
B43legacy_WARN_ON(wl->vif != vif);
wl->vif = NULL;
wl->operating = false;
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_adjust_opmode(dev);
eth_zero_addr(wl->mac_addr);
b43legacy_upload_card_macaddress(dev);
spin_unlock_irqrestore(&wl->irq_lock, flags);
mutex_unlock(&wl->mutex);
}
static int b43legacy_op_start(struct ieee80211_hw *hw)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
int did_init = 0;
int err = 0;
/* Kill all old instance specific information to make sure
* the card won't use it in the short timeframe between start
* and mac80211 reconfiguring it. */
eth_zero_addr(wl->bssid);
eth_zero_addr(wl->mac_addr);
wl->filter_flags = 0;
wl->beacon0_uploaded = false;
wl->beacon1_uploaded = false;
wl->beacon_templates_virgin = true;
wl->radio_enabled = true;
mutex_lock(&wl->mutex);
if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
err = b43legacy_wireless_core_init(dev);
if (err)
goto out_mutex_unlock;
did_init = 1;
}
if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
err = b43legacy_wireless_core_start(dev);
if (err) {
if (did_init)
b43legacy_wireless_core_exit(dev);
goto out_mutex_unlock;
}
}
wiphy_rfkill_start_polling(hw->wiphy);
out_mutex_unlock:
mutex_unlock(&wl->mutex);
return err;
}
static void b43legacy_op_stop(struct ieee80211_hw *hw)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
cancel_work_sync(&(wl->beacon_update_trigger));
mutex_lock(&wl->mutex);
if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
b43legacy_wireless_core_stop(dev);
b43legacy_wireless_core_exit(dev);
wl->radio_enabled = false;
mutex_unlock(&wl->mutex);
}
static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
struct ieee80211_sta *sta, bool set)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
unsigned long flags;
spin_lock_irqsave(&wl->irq_lock, flags);
b43legacy_update_templates(wl);
spin_unlock_irqrestore(&wl->irq_lock, flags);
return 0;
}
static int b43legacy_op_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
struct b43legacy_wldev *dev = wl->current_dev;
struct ieee80211_conf *conf = &hw->conf;
if (idx != 0)
return -ENOENT;
survey->channel = conf->chandef.chan;
survey->filled = SURVEY_INFO_NOISE_DBM;
survey->noise = dev->stats.link_noise;
return 0;
}
static const struct ieee80211_ops b43legacy_hw_ops = {
.tx = b43legacy_op_tx,
.wake_tx_queue = ieee80211_handle_wake_tx_queue,
.conf_tx = b43legacy_op_conf_tx,
.add_interface = b43legacy_op_add_interface,
.remove_interface = b43legacy_op_remove_interface,
.config = b43legacy_op_dev_config,
.bss_info_changed = b43legacy_op_bss_info_changed,
.configure_filter = b43legacy_op_configure_filter,
.get_stats = b43legacy_op_get_stats,
.start = b43legacy_op_start,
.stop = b43legacy_op_stop,
.set_tim = b43legacy_op_beacon_set_tim,
.get_survey = b43legacy_op_get_survey,
.rfkill_poll = b43legacy_rfkill_poll,
};
/* Hard-reset the chip. Do not call this directly.
* Use b43legacy_controller_restart()
*/
static void b43legacy_chip_reset(struct work_struct *work)
{
struct b43legacy_wldev *dev =
container_of(work, struct b43legacy_wldev, restart_work);
struct b43legacy_wl *wl = dev->wl;
int err = 0;
int prev_status;
mutex_lock(&wl->mutex);
prev_status = b43legacy_status(dev);
/* Bring the device down... */
if (prev_status >= B43legacy_STAT_STARTED)
b43legacy_wireless_core_stop(dev);
if (prev_status >= B43legacy_STAT_INITIALIZED)
b43legacy_wireless_core_exit(dev);
/* ...and up again. */
if (prev_status >= B43legacy_STAT_INITIALIZED) {
err = b43legacy_wireless_core_init(dev);
if (err)
goto out;
}
if (prev_status >= B43legacy_STAT_STARTED) {
err = b43legacy_wireless_core_start(dev);
if (err) {
b43legacy_wireless_core_exit(dev);
goto out;
}
}
out:
if (err)
wl->current_dev = NULL; /* Failed to init the dev. */
mutex_unlock(&wl->mutex);
if (err)
b43legacyerr(wl, "Controller restart FAILED\n");
else
b43legacyinfo(wl, "Controller restarted\n");
}
static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
int have_bphy,
int have_gphy)
{
struct ieee80211_hw *hw = dev->wl->hw;
struct b43legacy_phy *phy = &dev->phy;
phy->possible_phymodes = 0;
if (have_bphy) {
hw->wiphy->bands[NL80211_BAND_2GHZ] =
&b43legacy_band_2GHz_BPHY;
phy->possible_phymodes |= B43legacy_PHYMODE_B;
}
if (have_gphy) {
hw->wiphy->bands[NL80211_BAND_2GHZ] =
&b43legacy_band_2GHz_GPHY;
phy->possible_phymodes |= B43legacy_PHYMODE_G;
}
return 0;
}
static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
{
/* We release firmware that late to not be required to re-request
* is all the time when we reinit the core. */
b43legacy_release_firmware(dev);
}
static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
{
struct b43legacy_wl *wl = dev->wl;
struct ssb_bus *bus = dev->dev->bus;
struct pci_dev *pdev = (bus->bustype == SSB_BUSTYPE_PCI) ? bus->host_pci : NULL;
int err;
int have_bphy = 0;
int have_gphy = 0;
u32 tmp;
/* Do NOT do any device initialization here.
* Do it in wireless_core_init() instead.
* This function is for gathering basic information about the HW, only.
* Also some structs may be set up here. But most likely you want to
* have that in core_init(), too.
*/
err = ssb_bus_powerup(bus, 0);
if (err) {
b43legacyerr(wl, "Bus powerup failed\n");
goto out;
}
/* Get the PHY type. */
if (dev->dev->id.revision >= 5) {
u32 tmshigh;
tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
if (!have_gphy)
have_bphy = 1;
} else if (dev->dev->id.revision == 4)
have_gphy = 1;
else
have_bphy = 1;
dev->phy.gmode = (have_gphy || have_bphy);
dev->phy.radio_on = true;
tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
b43legacy_wireless_core_reset(dev, tmp);
err = b43legacy_phy_versioning(dev);
if (err)
goto err_powerdown;
/* Check if this device supports multiband. */
if (!pdev ||
(pdev->device != 0x4312 &&
pdev->device != 0x4319 &&
pdev->device != 0x4324)) {
/* No multiband support. */
have_bphy = 0;
have_gphy = 0;
switch (dev->phy.type) {
case B43legacy_PHYTYPE_B:
have_bphy = 1;
break;
case B43legacy_PHYTYPE_G:
have_gphy = 1;
break;
default:
B43legacy_BUG_ON(1);
}
}
dev->phy.gmode = (have_gphy || have_bphy);
tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
b43legacy_wireless_core_reset(dev, tmp);
err = b43legacy_validate_chipaccess(dev);
if (err)
goto err_powerdown;
err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
if (err)
goto err_powerdown;
/* Now set some default "current_dev" */
if (!wl->current_dev)
wl->current_dev = dev;
INIT_WORK(&dev->restart_work, b43legacy_chip_reset);
b43legacy_radio_turn_off(dev, 1);
b43legacy_switch_analog(dev, 0);
ssb_device_disable(dev->dev, 0);
ssb_bus_may_powerdown(bus);
out:
return err;
err_powerdown:
ssb_bus_may_powerdown(bus);
return err;
}
static void b43legacy_one_core_detach(struct ssb_device *dev)
{
struct b43legacy_wldev *wldev;
struct b43legacy_wl *wl;
/* Do not cancel ieee80211-workqueue based work here.
* See comment in b43legacy_remove(). */
wldev = ssb_get_drvdata(dev);
wl = wldev->wl;
b43legacy_debugfs_remove_device(wldev);
b43legacy_wireless_core_detach(wldev);
list_del(&wldev->list);
wl->nr_devs--;
ssb_set_drvdata(dev, NULL);
kfree(wldev);
}
static int b43legacy_one_core_attach(struct ssb_device *dev,
struct b43legacy_wl *wl)
{
struct b43legacy_wldev *wldev;
int err = -ENOMEM;
wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
if (!wldev)
goto out;
wldev->dev = dev;
wldev->wl = wl;
b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
wldev->bad_frames_preempt = modparam_bad_frames_preempt;
tasklet_setup(&wldev->isr_tasklet, b43legacy_interrupt_tasklet);
if (modparam_pio)
wldev->__using_pio = true;
INIT_LIST_HEAD(&wldev->list);
err = b43legacy_wireless_core_attach(wldev);
if (err)
goto err_kfree_wldev;
list_add(&wldev->list, &wl->devlist);
wl->nr_devs++;
ssb_set_drvdata(dev, wldev);
b43legacy_debugfs_add_device(wldev);
out:
return err;
err_kfree_wldev:
kfree(wldev);
return err;
}
static void b43legacy_sprom_fixup(struct ssb_bus *bus)
{
/* boardflags workarounds */
if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
bus->boardinfo.type == 0x4E &&
bus->sprom.board_rev > 0x40)
bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
}
static void b43legacy_wireless_exit(struct ssb_device *dev,
struct b43legacy_wl *wl)
{
struct ieee80211_hw *hw = wl->hw;
ssb_set_devtypedata(dev, NULL);
ieee80211_free_hw(hw);
}
static int b43legacy_wireless_init(struct ssb_device *dev)
{
struct ssb_sprom *sprom = &dev->bus->sprom;
struct ieee80211_hw *hw;
struct b43legacy_wl *wl;
int err = -ENOMEM;
int queue_num;
b43legacy_sprom_fixup(dev->bus);
hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
if (!hw) {
b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
goto out;
}
/* fill hw info */
ieee80211_hw_set(hw, RX_INCLUDES_FCS);
ieee80211_hw_set(hw, SIGNAL_DBM);
ieee80211_hw_set(hw, MFP_CAPABLE); /* Allow WPA3 in software */
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC);
hw->queues = 1; /* FIXME: hardware has more queues */
hw->max_rates = 2;
SET_IEEE80211_DEV(hw, dev->dev);
if (is_valid_ether_addr(sprom->et1mac))
SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
else
SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);
wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
/* Get and initialize struct b43legacy_wl */
wl = hw_to_b43legacy_wl(hw);
memset(wl, 0, sizeof(*wl));
wl->hw = hw;
spin_lock_init(&wl->irq_lock);
spin_lock_init(&wl->leds_lock);
mutex_init(&wl->mutex);
INIT_LIST_HEAD(&wl->devlist);
INIT_WORK(&wl->beacon_update_trigger, b43legacy_beacon_update_trigger_work);
INIT_WORK(&wl->tx_work, b43legacy_tx_work);
/* Initialize queues and flags. */
for (queue_num = 0; queue_num < B43legacy_QOS_QUEUE_NUM; queue_num++) {
skb_queue_head_init(&wl->tx_queue[queue_num]);
wl->tx_queue_stopped[queue_num] = 0;
}
ssb_set_devtypedata(dev, wl);
b43legacyinfo(wl, "Broadcom %04X WLAN found (core revision %u)\n",
dev->bus->chip_id, dev->id.revision);
err = 0;
out:
return err;
}
static int b43legacy_probe(struct ssb_device *dev,
const struct ssb_device_id *id)
{
struct b43legacy_wl *wl;
int err;
int first = 0;
wl = ssb_get_devtypedata(dev);
if (!wl) {
/* Probing the first core - setup common struct b43legacy_wl */
first = 1;
err = b43legacy_wireless_init(dev);
if (err)
goto out;
wl = ssb_get_devtypedata(dev);
B43legacy_WARN_ON(!wl);
}
err = b43legacy_one_core_attach(dev, wl);
if (err)
goto err_wireless_exit;
/* setup and start work to load firmware */
INIT_WORK(&wl->firmware_load, b43legacy_request_firmware);
schedule_work(&wl->firmware_load);
out:
return err;
err_wireless_exit:
if (first)
b43legacy_wireless_exit(dev, wl);
return err;
}
static void b43legacy_remove(struct ssb_device *dev)
{
struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
/* We must cancel any work here before unregistering from ieee80211,
* as the ieee80211 unreg will destroy the workqueue. */
cancel_work_sync(&wldev->restart_work);
cancel_work_sync(&wl->firmware_load);
complete(&wldev->fw_load_complete);
B43legacy_WARN_ON(!wl);
if (!wldev->fw.ucode)
return; /* NULL if fw never loaded */
if (wl->current_dev == wldev)
ieee80211_unregister_hw(wl->hw);
b43legacy_one_core_detach(dev);
if (list_empty(&wl->devlist))
/* Last core on the chip unregistered.
* We can destroy common struct b43legacy_wl.
*/
b43legacy_wireless_exit(dev, wl);
}
/* Perform a hardware reset. This can be called from any context. */
void b43legacy_controller_restart(struct b43legacy_wldev *dev,
const char *reason)
{
/* Must avoid requeueing, if we are in shutdown. */
if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
return;
b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
ieee80211_queue_work(dev->wl->hw, &dev->restart_work);
}
#ifdef CONFIG_PM
static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
{
struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
struct b43legacy_wl *wl = wldev->wl;
b43legacydbg(wl, "Suspending...\n");
mutex_lock(&wl->mutex);
wldev->suspend_init_status = b43legacy_status(wldev);
if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
b43legacy_wireless_core_stop(wldev);
if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
b43legacy_wireless_core_exit(wldev);
mutex_unlock(&wl->mutex);
b43legacydbg(wl, "Device suspended.\n");
return 0;
}
static int b43legacy_resume(struct ssb_device *dev)
{
struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
struct b43legacy_wl *wl = wldev->wl;
int err = 0;
b43legacydbg(wl, "Resuming...\n");
mutex_lock(&wl->mutex);
if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
err = b43legacy_wireless_core_init(wldev);
if (err) {
b43legacyerr(wl, "Resume failed at core init\n");
goto out;
}
}
if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
err = b43legacy_wireless_core_start(wldev);
if (err) {
b43legacy_wireless_core_exit(wldev);
b43legacyerr(wl, "Resume failed at core start\n");
goto out;
}
}
b43legacydbg(wl, "Device resumed.\n");
out:
mutex_unlock(&wl->mutex);
return err;
}
#else /* CONFIG_PM */
# define b43legacy_suspend NULL
# define b43legacy_resume NULL
#endif /* CONFIG_PM */
static struct ssb_driver b43legacy_ssb_driver = {
.name = KBUILD_MODNAME,
.id_table = b43legacy_ssb_tbl,
.probe = b43legacy_probe,
.remove = b43legacy_remove,
.suspend = b43legacy_suspend,
.resume = b43legacy_resume,
};
static void b43legacy_print_driverinfo(void)
{
const char *feat_pci = "", *feat_leds = "",
*feat_pio = "", *feat_dma = "";
#ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
feat_pci = "P";
#endif
#ifdef CONFIG_B43LEGACY_LEDS
feat_leds = "L";
#endif
#ifdef CONFIG_B43LEGACY_PIO
feat_pio = "I";
#endif
#ifdef CONFIG_B43LEGACY_DMA
feat_dma = "D";
#endif
printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
"[ Features: %s%s%s%s ]\n",
feat_pci, feat_leds, feat_pio, feat_dma);
}
static int __init b43legacy_init(void)
{
int err;
b43legacy_debugfs_init();
err = ssb_driver_register(&b43legacy_ssb_driver);
if (err)
goto err_dfs_exit;
b43legacy_print_driverinfo();
return err;
err_dfs_exit:
b43legacy_debugfs_exit();
return err;
}
static void __exit b43legacy_exit(void)
{
ssb_driver_unregister(&b43legacy_ssb_driver);
b43legacy_debugfs_exit();
}
module_init(b43legacy_init)
module_exit(b43legacy_exit)
